JPWO2016017451A1 - Receiving device, receiving method, transmitting device, and transmitting method - Google Patents

Abstract

The present technology relates to a reception device, a reception method, a transmission device, and a transmission method that can reliably operate an application that is executed in conjunction with AV content. As information for controlling the operation of the application executed in conjunction with the AV content, a trigger information acquisition unit that acquires trigger information including at least location information, and application control information for controlling the operation of the application are acquired. A receiving device is provided that includes a metadata acquisition unit, and an application control unit that controls the operation of an application based on trigger information and application control information. The present technology can be applied to, for example, a television receiver.

Description

  The present technology relates to a reception device, a reception method, a transmission device, and a transmission method, and in particular, a reception device, a reception method, and a reception device that can reliably operate an application executed in conjunction with AV content. The present invention relates to a transmission device and a transmission method.

  An operation of redistributing AV (Audio Video) content such as a program broadcast by terrestrial broadcasting by cable television (CATV: Cable Television) or satellite broadcasting is performed (for example, see Patent Document 1).

JP 2001-136444 A

  By the way, when AV content such as a program broadcast by terrestrial broadcasting is redistributed by cable television or the like, a mechanism defined in terrestrial broadcasting such as control of an application executed in conjunction with the AV content. However, there are cases where it cannot be maintained in redistribution of cable television or the like. In this case, since the receiver cannot operate an application executed in conjunction with AV content such as a program, a technique for reliably operating the application has been required.

  The present technology has been made in view of such a situation, and makes it possible to reliably operate an application executed in conjunction with AV content.

  The receiving device according to the first aspect of the present technology acquires first trigger information including at least location information as information for controlling an operation of an application executed in conjunction with AV (Audio Video) content. A second acquisition unit that acquires application control information for controlling the operation of the application, and a control unit that controls the operation of the application based on the trigger information and the application control information. A receiving device.

  The trigger information includes time information serving as a reference time for controlling the operation of the application, and the second acquisition unit acquires schedule control information that defines the operation of the application in time series, and the control When the time measured based on the time information has passed the time specified in the schedule control information, the unit controls the operation of the application according to action information for the application corresponding to the time. Can be.

  The application is composed of a plurality of files, the second acquisition unit acquires cache control information for controlling a cache of a file group constituting the application, and the control unit is configured to control the cache control. Based on the information, the file group constituting the application can be held in the cache memory.

  The trigger information may include editing information for editing contents defined in the schedule control information, and the control unit may edit the schedule control information based on the editing information.

  The location information is information for acquiring the application control information, the schedule control information, and the cache control information, and the application control information, the schedule control information, and the cache control information are the application It can be made to be related by the identification information.

  The trigger information includes action information for the application, and the control unit controls the operation of the application according to the action information included in the trigger information when the trigger information is acquired. be able to.

  The application is composed of a plurality of files, the second acquisition unit acquires cache control information for controlling a cache of a file group constituting the application, and the control unit is configured to control the cache control. Based on the information, the file group constituting the application can be held in the cache memory.

  The location information is information for acquiring the application control information and the cache control information, and the trigger information, the application control information, and the cache control information are associated by identification information of the application. Can be like that.

  The AV content is broadcast content transmitted by a digital broadcast signal, and the trigger information is distributed in a digital broadcast signal or distributed from a server on the Internet, and the first acquisition unit is The trigger information distributed by broadcasting or communication can be acquired.

  The receiving device according to the first aspect of the present technology may be an independent device, or may be an internal block constituting one device. The reception method according to the first aspect of the present technology is a reception method corresponding to the reception device according to the first aspect of the present technology described above.

  In the receiving device and the receiving method of the first aspect of the present technology, trigger information including at least location information is acquired as information for controlling an operation of an application executed in conjunction with AV content, Application control information for controlling the operation of the application is acquired, and the operation of the application is controlled based on the trigger information and the application control information.

  The transmission device according to the second aspect of the present technology includes an acquisition unit that acquires AV content and trigger information including at least location information as information for controlling an operation of an application that is executed in conjunction with the AV content. The trigger information and the application control information together with the first generation unit to generate, the second second generation unit to acquire to generate application control information for controlling the operation of the application, and the AV content It is a transmission apparatus provided with the transmission part which transmits.

  The first generation unit generates the trigger information including time information serving as a reference for time for controlling the operation of the application, and the second generation unit defines the operation of the application in time series. The schedule control information is generated, and the transmission unit can transmit the trigger information including the time information and the schedule control information.

  The application includes a plurality of files, the second generation unit generates cache control information for controlling a cache of a file group constituting the application, and the transmission unit includes the cache control. Information may be further transmitted.

  The first generation unit generates the trigger information including editing information for editing the contents defined in the schedule control information, and the transmission unit transmits the trigger information including the editing information. Can be.

  The location information is information for acquiring the application control information, the schedule control information, and the cache control information, and the application control information, the schedule control information, and the cache control information are the application It can be made to be related by the identification information.

  The first generation unit may generate the trigger information including action information for the application, and the transmission unit may transmit the trigger information including the action information.

  The application includes a plurality of files, the second generation unit generates cache control information for controlling a cache of a file group constituting the application, and the transmission unit includes the cache control. Information may be further transmitted.

  The location information is information for acquiring the application control information and the cache control information, and the trigger information, the application control information, and the cache control information are associated by identification information of the application. Can be like that.

  The AV content may be broadcast content, and the transmission unit may transmit the trigger information and application control information together with the AV content using a digital broadcast signal.

  The transmission device according to the second aspect of the present technology may be an independent device, or may be an internal block constituting one device. A transmission method according to the second aspect of the present technology is a transmission method corresponding to the transmission device according to the second aspect of the present technology described above.

  In the transmission device and the transmission method according to the second aspect of the present technology, at least location information is included as information for controlling the operation of an application that is acquired and executed in conjunction with the AV content. Trigger information is generated, application control information for controlling the operation of the application is generated, and the trigger information and application control information are transmitted together with the AV content.

  According to the first aspect and the second aspect of the present technology, it is possible to reliably operate an application executed in conjunction with AV content.

  Note that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

It is a figure which shows the structure of trigger information. It is a figure which shows the description method of action information. It is a figure which shows the description method of event information. It is a figure which shows the example of description of trigger information. It is a figure which shows the example of the syntax of AIT. It is a figure which shows the example of the syntax of EMT. It is a figure explaining the outline | summary of CCT. It is a figure explaining the outline | summary of CCT. It is a figure which shows the example of the syntax of CCT. It is a figure which shows the system pipe model of digital broadcasting of an IP transmission system. It is a figure explaining use case 1. FIG. It is a figure explaining use case 1. FIG. It is a figure which shows the correspondence of each data in use case 1. FIG. It is a figure explaining use case 2. FIG. It is a figure explaining use case 2. FIG. It is a figure which shows the correspondence of each data in use case 2. FIG. It is a figure explaining use case 3. FIG. It is a figure explaining use case 3. FIG. It is a figure explaining use case 4. FIG. It is a figure which shows the correspondence of each data in use case 4. FIG. It is a figure explaining use case 5. FIG. It is a figure which shows the correspondence of each data in use case 5. FIG. It is a figure explaining use case 6. FIG. It is a figure which shows the structural example of a broadcast communication system. It is a figure which shows the structural example of a transmitter. It is a figure which shows the structural example of a receiver. It is a figure which shows the structural example of a control part. It is a figure which shows the structural example of each server. It is a flowchart explaining the flow of a digital broadcast signal transmission process. It is a flowchart explaining the flow of a digital broadcast signal reception process. It is a flowchart explaining the flow of the application control process linked with the recorded program. It is a flowchart explaining the flow of the application control process linked with the live program. It is a flowchart explaining the flow of a hybrid type application control process. It is a flowchart explaining the flow of an application delivery process. It is a flowchart explaining the flow of a metadata delivery process. It is a flowchart explaining the flow of a trigger information delivery process. It is a figure which shows the structural example of a computer.

  Hereinafter, embodiments of the present technology will be described with reference to the drawings. The description will be made in the following order.

1. 1. Overview of application control 2. Overview of digital broadcasting by IP transmission method Specific Use Case (1) Use Case 1: Application Control Linked to Recorded Program (2) Use Case 2: Application Control Linked to Live Program (3) Use Case 3: Hybrid Application Control ( 4) Use case 4: Application control linked to pre-recorded programs (ACR compatible)
(5) Use case 5: Application control linked to live programs (ACR compatible)
(6) Use case 6: Application control using SCS signaling information 4. System configuration 5. Flow of processing executed in each device Computer configuration

<1. Overview of application control>

  First, an outline of application control to which the present technology is applied will be described.

  In application control to which the present technology is applied, operation of an application executed in conjunction with AV content such as a program is controlled using trigger information and metadata.

  The trigger information includes at least location information as information for controlling the operation of the application. The metadata is composed of AIT (Application Information Table), EMT (Event Message Table), and CCT (Content Configuration Table).

  AIT is application control information for controlling the operation of the application. EMT is schedule control information that defines the operation of an application in time series. The CCT is cache control information for controlling the cache of the file group constituting the application. Hereinafter, a detailed configuration of trigger information and metadata will be described.

(Detailed configuration of trigger information)
FIG. 1 is a diagram illustrating a configuration of trigger information.

  The trigger information has a structure in which a command ID (cmdID) indicating the type of trigger information and a URI (Uniform Resource Identifier) as location information that is the trigger information body are described. For example, “0” is designated as the command ID when trigger information is applied to application control related to the present technology. In FIG. 1, locator_part corresponds to a URI, and terms can be optionally specified. In FIG. 1, the command ID is omitted.

  Action information (action), media time information (media_time), or event information (event) is specified in terms. In the action information, various actions for the application are specified. In the media time information, information (time information) indicating a reference time (for example, current time) for controlling the operation of the application is designated. In the event information, information (edit information) for editing the contents defined in EMT is designated.

  In addition, the parameters of spread information (spread), version information (version), or other (others) can be optionally specified for the term. In the spread information, information for stochastically distributing operations related to the application is designated. As version information, version information of AIT, EMT, and CCT is specified. These parameters are connected by “&”.

  Here, as shown in FIG. 2, in the action information specified in the term of FIG. 1, an application ID (appID) and an action code (action_code) are connected by a period. In the application ID, identification information of the target application is specified.

  The action code specifies an action to be executed by the application identified by the application ID. For example, codes such as “a1” to “a4” and “e1” to “eN” (N is an integer of 1 or more) are specified as the action code.

  Prefetch is an action for instructing acquisition of an application. The prefetch action code is “a1”. Note that prefetch may be referred to as “prepare”, but here, the prefetch is described as being unified.

  Execute (Execute (Exec)) is an action for instructing acquisition or activation of an application. When the target application is paused, execution of the application is resumed. The execute action code is “a2”.

  Kill is an action for terminating a running application. The kill action code is "a3".

  Suspend is an action for suspending and pausing a running application. The suspend action code is "a4".

  In the action code, “e1” to “eN” (N is an integer of 1 or more) is specified as an event ID (stream event ID). When a stream event ID is specified as an action code, data associated with the stream event is specified as event data (event_data). That is, the event data has an optional value corresponding to the stream event. By designating a stream event ID, an event can be fired (a predetermined script is executed) for a running application.

  In addition, when describing several action information simultaneously, application ID (appID), action code (action_code), and optional event data (event_data) will be described repeatedly. In the event time (event_time), a time for executing an action on the application is designated. When the trigger information is executed immediately after obtaining the trigger information, it is not necessary to specify the event time.

  Further, as shown in FIG. 3, in the event information specified in the term of FIG. 1, an event ID (eventID) and an edit code (edit_code) are connected by a period. In the event ID, identification information of a target event is specified among events defined in time series in the EMT.

  In the edit code, information (edit information) for editing the event identified by the event ID is designated. As this editing information, deletion (delete) or update (update) is designated. However, in the case of updating, information indicating the time after updating is specified in the event time (event_time). The deletion edit code is "1", and the update edit code is "2".

(Example of trigger information description)
FIG. 4 is a diagram illustrating a description example of trigger information.

  In FIG. 4, “xbc.tv/e12” in the first line indicates trigger information when no terms are specified. When metadata (AIT, EMT, CCT) is distributed by communication, connect to a server on the Internet according to the URL (Uniform Resource Locator) with "http: //" added to the beginning of the trigger information. As a result, the metadata file is acquired. In addition, when metadata (AIT, EMT, CCT) is distributed by broadcast, SCS (Service Channel Signaling) transmitted in a FLUTE (File Delivery over Unidirectional Transport) session according to the URL obtained from the trigger information. ) By connecting to the stream, the metadata file is acquired.

  “Xbc.tv/e12?m=5a33” on the second line indicates trigger information when media time information (m: media_time) is specified as the term. “m = 5a33” designates the time when the trigger information is received.

  “Xbc.tv/e12?a=42a8.a2” on the third line indicates trigger information when action information (a: action) is specified as the term. "a = 42a8.a2" specifies an application ID "42a8" and an action code "a2". That is, the trigger information specifies an execute action for the application with the application ID “42a8”.

  “Xbx.tv/e12?a=42a8.a4&a=4314.a2” on the fourth line indicates trigger information when a plurality of actions are designated as terms. That is, the trigger information specifies the suspend action for the application with the application ID “42a8” and the execute action for the application with the application ID “4314”.

  “Xbc.tv/e12?a=42a8.e1.1762&t=77ee” on the fifth line indicates trigger information when an event firing action is specified as a term. That is, the trigger information specifies an event (stream event) that is “e1” for an application with an application ID that is “42a8”. However, the event is executed at the time “77ee”, and the data “1762” is used when the event is fired.

  “Xbc.tv/e12?e=12.1” on the sixth line indicates trigger information when an event is specified as a term. That is, the trigger information specifies that an event with an event ID of “12” is deleted from events defined in time series in the EMT.

  “Xbc.tv/e12?e=12.2&t=77ee” on the seventh line indicates trigger information when an event is specified as the term. That is, the trigger information specifies that the time of the event with the event ID “12” is updated to the time “77ee” among the events defined in time series in the EMT.

(Detailed configuration of metadata)

(Detailed configuration of AIT)
FIG. 5 is a diagram illustrating an example of the syntax of AIT.

  The AIT is described in a markup language such as XML (Extensible Markup Language). In FIG. 5, among the elements and attributes, “@” is added to the attribute. Further, the indented element and attribute are specified for the upper element. These relationships are the same in other syntaxes described later.

  In FIG. 5, the ApplicationDiscovery element in the ServiceDiscovery element is an upper element of the DomainName attribute and the ApplicationList element. The DomainName attribute specifies the name of the domain. The ApplicationList element is an upper element of the Application element, and describes one or a plurality of Application elements as a list.

  Information related to the application is specified in the Application element. The Application element is an upper element of the appName element, applicationIdentifier element, applicationDescriptor element, applicationTransport element, applicationLocation element, and application Boundary element.

  In the appName element, the name of the application is specified.

  In the applicationIdentifier element, information related to application identification information is specified. The applicationIdentifier element is an upper element of the orgId element and the appId element. An organization ID is specified in the orgId element. An application ID is specified in the appId element. This application ID corresponds to the application ID of the trigger information in FIG.

  The applicationDescriptor element is an upper element of the type element, controlCode element, serviceBound element, priority element, and icon element. In the type element, type information about the application is specified.

  In the controlCode element, an action to be executed by the application is specified. As this action information, for example, auto start, present, kill, or prefetch is designated.

  Auto start (AUTO START) is an action for instructing automatic execution of an application. On the other hand, a present (PRESENT) means that the application is not automatically executed. A kill (KILL) is an action for terminating a running application. Prefetch (PREFETCH) is an action for instructing acquisition of an application. In addition, you may make it use the action information prescribed | regulated by the trigger information mentioned above as the said action information.

  In the serviceBound element, information indicating whether the application depends on the service is specified. In the priority element, information indicating the priority when there are a plurality of applications is specified. In the icon element, the acquisition destination and size of the icon used in the application are specified.

  The applicationTransport element is an upper element of the type attribute, URLBase element, and URLExtension element. In the Type attribute, type information regarding application transmission is specified. Further, the URL (application URL) from which the application is acquired is specified by the URLBase element, the URLExtension element, and the applicationLocation element. In the application Boundary element, a domain indicating a range in which the application operates is specified.

  In Fig. 5, the number of occurrences (Cardinality), but when "1" is specified, only one element or attribute is specified, and when "0..1" is specified Specifying the element or attribute is optional. If "1..N" is specified, one or more elements or attributes are specified. If "0..N" is specified, one or more elements or attributes are specified. It is optional. The meaning of the number of appearances is the same in other syntaxes described later.

(Detailed configuration of EMT)
FIG. 6 is a diagram illustrating an example of syntax of EMT. The EMT is described in a markup language such as XML.

  The EMT element is an upper element of the majorProtocolversion attribute, minorProtocolVersion attribute, id attribute, EMTVersion attribute, beginMT attribute, LiveTrigger element, and Event element.

  Syntax major information is specified in the majorProtocolversion attribute and the minorProtocolVersion attribute. In the id attribute, identification information for identifying the EMT is specified. For example, in the id attribute, a character string in which domain_name and program_id (segment_id) are concatenated with “/” is designated. In the EMTVersion attribute, EMT version information is specified. In the beginMT attribute, information indicating the time when the media time corresponding to EMT starts is specified.

  In the LiveTrigger element, information about trigger information (live trigger information) when trigger information is transmitted from a server on the Internet is described. The LiveTrigger element has a URL attribute and a pollPeriod attribute specified. In the URL attribute, a URL for connecting to a server that provides live trigger information is specified. In the pollPeriod attribute, a polling cycle for acquiring live trigger information from the server is specified.

  In the Event element, event information is defined in time series. The Event element is an upper element of the id attribute, appID attribute, action attribute, startTime attribute, endTime attribute, and Data element. An event ID is specified in the id attribute. An application ID is specified in the appID attribute.

  In the action attribute, an action to be executed by the application is specified. As this action information, a prefetch, execute, suspend, kill, or injection event is designated.

  Prefetch is an action for instructing acquisition of an application. As described above, prefetch may be referred to as “prepare”.

  Execute is an action for instructing acquisition or activation of an application. When the target application is paused, execution of the application is resumed.

  Suspend is an action for suspending and pausing a running application. Kill is an action for terminating a running application. An inject event is an action for firing an event as a stream event.

  In the startTime attribute, information indicating the start time of the effective period of the action for the application is specified. In the endTime attribute, information indicating the end time of the effective period of the action for the application is specified.

  That is, the effective period of the action for the application is determined by the startTime attribute and the endTime attribute indicating two points on the progress time axis of the corresponding AV content. For example, when the progress timing of the AV content measured by the internal clock (media time information) of the receiver has passed the valid start time indicated by the startTime attribute, the action corresponding to the valid start time is validated. . In this case, only the startTime attribute may be specified without specifying the endTime attribute.

  In addition, when the progress timing of the AV content measured by the internal clock of the receiver is within the valid period, the action corresponding to the valid period is valid and the progress timing of the AV content has not reached the valid period. Alternatively, when it has passed, the action corresponding to the validity period may be invalidated. That is, in the receiver, when the time measured by the internal clock (media time information) satisfies a predetermined valid condition based on the valid period or the like, the action corresponding to the valid period is validated.

  In the Data element, when an injection event is specified as action information, data used in the event is specified. A data ID for identifying the data is specified by the dataID attribute of the child element of the Data element.

(Detailed configuration of CCT)
FIG. 7 is a diagram for explaining the outline of CCT.

  FIG. 7 shows the structure of an application having an application ID “a1”. The application includes a plurality of files such as an HTML (HyperText Markup Language) file and a JPEG (Joint Photographic Experts Group) file. In FIG. 7, an HTML file is represented by “An”, and a resource file referred to from an HTML file such as a JPEG file is represented by “Bn”. In “An” and “Bn”, “n” is designated by a number for identifying each file.

  The top page HTML file A11 is linked to the HTML file A01 and the HTML file A12. The HTML file A01 is linked to the HTML file A02, and the HTML file A02 is further linked to the HTML file A03.

  Here, if the files that make up the application are grouped in the unit to be presented (that is, in units of pages, hereinafter referred to as “PU (Presentation Unit)”), the HTML file A11 that is the top page is Since the files B02, B11, and B14 are referred to, PU_ID = 1 is assigned to these four files as one collection.

  Similarly, since the HTML file A12 refers to the resource files B07, B09, B12, and B13, these five files can be set as a set of PU_ID = 2. Further, since the HTML file A01 refers to the resource files B01, B03, and B04, these four files can be set as a set of PU_ID = 3. Furthermore, since the HTML file A02 refers to the resource files B05 and B06, these three files can be a set of PU_ID = 4. Since the HTML file A03 refers to the resource files B05 and B08, these three files can be a set of PU_ID = 5.

  As described above, the file group constituting the application having the application ID “a1” can be divided into a plurality of groups in units of PUs for each set identified by PU_ID = 1 to 5.

  By the way, the receiver can speed up the processing related to the application by holding the file group constituting the application in the cache memory. However, the file that can be held in the cache memory depends on the capacity of the cache memory, etc. Limited. Therefore, the CCT provides cache control information for controlling the cache of the file group that constitutes the application, so that the receiver can hold the file in the cache memory according to the capacity of the cache memory. .

  For example, as shown in FIG. 8, when the receiver can hold only a minimum group of files in the cache memory ("Minimum Cache" on the left side of the figure), only the presented HTML file and its resource file are cache memory. To be retained. Specifically, when the top page HTML file A11 is presented, only the file group belonging to PU_ID = 1 is held in the cache memory. Further, when the transition is made from the HTML file A11 to the HTML file A01, only the file group belonging to PU_ID = 3 is held in the cache memory.

  Also, for example, when the receiver can hold more intermediate files than the minimum files in the cache memory ("Medium Cache" in the center of the figure), only the presented HTML file and its resource file In addition, the peripheral file group is also held in the cache memory. Specifically, when the top page HTML file A11 is presented, not only the file group belonging to PU_ID = 1 but also the file group belonging to PU_ID = 2, 3 as the link destination is retained in the cache memory. Is done. In addition, when transitioning from the HTML file A11 to the HTML file A01, not only the file group belonging to PU_ID = 3 but also the file group belonging to PU_ID = 4, 5 as the link destination is held in the cache memory.

  Also, for example, if the receiver can hold the maximum number of files in the cache memory ("Maximum Cache" on the right side of the figure), not only the HTML file and its resource file that are presented, but all of the applications This file group is held in the cache memory. Specifically, when the top page HTML file A11 is presented, not only the file group belonging to PU_ID = 1 but also the file group belonging to PU_ID = 2 to 5 is held in the cache memory. Further, when the transition is made from the HTML file A11 to the HTML file A01, not only the file group belonging to PU_ID = 3 but also the file group belonging to PU_ID = 1, 2, 4, 5 is held in the cache memory.

  Thus, by providing the CCT as the cache control information, the receiver can adaptively hold the file in the cache memory according to the capacity of the cache memory. In particular, since files distributed by broadcast are periodically distributed, if a desired file is missed, it may be possible to acquire the file only after tens of seconds or minutes, The machine can properly hold the file in the cache memory to avoid such a case.

  FIG. 9 is a diagram illustrating an example of CCT syntax. The CCT is described in a markup language such as XML.

  The CCT element is an upper element of the majorProtocolversion attribute, the minorProtocolVersion attribute, the CCTVersion attribute, the baseURI attribute, and the Application element.

  Syntax major information is specified in the majorProtocolversion attribute and the minorProtocolVersion attribute. The CCTVersion attribute specifies CCT version information. In the baseURI attribute, a common URL that is the base of the URL related to CCT is specified.

  In the Application element, cache control information for each application is specified. The Application element is an upper element of the appID attribute, the size attribute, and the PU element. An application ID is specified in the appID attribute. This application ID corresponds to an application ID such as AIT in FIG. In the size attribute, information indicating the size of the entire application is specified.

  In the PU element, cache control information for each unit to be presented is specified. The PU element is an upper element of the id attribute, the size attribute, the Item element, and the LinkedPU element. In the id attribute, PU identification information (PU_ID in FIG. 7 and the like) is designated. In the size attribute, information indicating the size in PU units is specified. The receiver can determine the file to be held in the cache memory by checking the size information for each PU.

  In the Item element, information on each file constituting the PU is specified. The Item element is an upper element of the primary attribute, the uri attribute, and the type attribute. In the primary attribute, information on the primary file in the PU is specified. For example, in the application, the primary file is an HTML file, and this information enables the receiver to recognize that a specific PU has been imported.

  The URL of each file is specified in the uri attribute. As this URL, a URL relative to the URL specified by the baseURI attribute is specified. In the type attribute, “m” or “p” is specified as type information. When “m” is specified as this type information, it indicates that the file constitutes a PU. On the other hand, when “p” is specified as the type information, it indicates that the file is not a file constituting the PU but a specific file. For example, type information “p” is specified for a specific file that the broadcaster wants to forcibly acquire in advance.

  In the LinkedPU element, information related to the PU linked to the target PU is specified. In the id attribute of the child element of the LinkedPU element, linked PU identification information (PU_ID in FIG. 7 and the like) is designated. By referring to the identification information of the linked PUs, the receiver side can hold, for example, an intermediate file group, which is larger than the minimum file group, in the cache memory (“center” in FIG. 8). Medium Cache ").

<2. Overview of digital broadcasting using IP transmission system>

  AV content such as programs can be transmitted by digital broadcasting employing an IP (Internet Protocol) transmission method.

(System pipe model)
FIG. 10 is a diagram showing a system pipe model of digital broadcasting using the IP transmission method.

  In FIG. 10, a plurality of BBP (Base Band Packet) streams are transmitted on a broadcast wave (RF Channel) having a predetermined frequency band. Each BBP stream includes NTP (Network Time Protocol), a plurality of service channels (Service Channel), an ESG (Electronic Service Guide) service, and LLS (Low Layer Signaling). The NTP, the service channel, and the ESG service are transmitted according to the UDP / IP (User Datagram Protocol / Internet Protocol) protocol, but the LLS is transmitted on the BBP stream.

  NTP is time information. ESG service is an electronic service guide. In LLS, low layer signaling information is transmitted. For example, LLS signaling information such as SCD (Service Configuration Description), EAD (Emergency Alerting Description), and RRD (Region Rating Description) is transmitted as LLS.

  SCD indicates a BBP stream configuration and a service configuration in a broadcast network by an ID system corresponding to the MPEG2-TS (Moving Picture Experts Group phase 2-Transport Stream) system. The SCD includes attribute / setting information for each service, bootstrap information for connecting to the ESG service and the SCS, and the like.

  The EAD contains information about emergency notifications. The RRD includes rating information. Note that the LLS signaling information such as SCD, EAD, and RRD is described in a markup language such as XML.

  A service channel (hereinafter referred to as “service”) is composed of SCS (Service Channel Signaling) and components (Components) constituting a program such as video, audio, and subtitles. In addition, a common IP address is given to the elements constituting each service, and components, SCSs, and the like can be packaged for each service using this IP address.

  In SCS, signaling information for each service is transmitted. For example, as SCS, SCS signaling such as USD (User Service Description), MPD (Media Presentation Description), SDP (Session Description Protocol), FDD (File Delivery Description), SPD (Service Parameter Description), IS (Initialization Segment), etc. Information is transmitted.

  The USD includes reference information for referring to SCS signaling information such as MPD, FDD, and SDP. USD may be referred to as USBD (User Service Bundle Description). The MPD includes information such as a segment URL for each component stream transmitted in service units. Note that MPD conforms to the MPEG-DASH (Moving Picture Expert Group-Dynamic Adaptive Streaming over HTTP) standard. The SDP includes service attributes for each service, stream configuration information and attributes, filter information, location information, and the like.

  The FDD includes information such as location information (for example, URL) and TOI (Transport Object Identifier) as index information for each TSI (Transport Session Identifier). Here, in a FLUTE (File Delivery over Unidirectional Transport) session, a file to be transmitted is managed as one object by TOI. In addition, a set of a plurality of objects is managed as one session by TSI.

  That is, in the FLUTE session, a specific file can be designated by two pieces of identification information of TSI and TOI. Note that FDD may be included as an element in USD. Further, instead of FLUTE, FLUTE + (FLUTE plus) obtained by expanding FLUTE may be used.

  The SPD is configured to include various parameters defined at the service or component level. The IS includes control information related to segment data of video and audio components transmitted in the FLUTE session.

  That is, when video and audio components are transmitted in a FLUTE session, the files of these components are divided into segments, and each segment is composed of an IS (Initialization Segment) and an MS (Media Segment). The IS includes initialization information such as a data compression method and control information. In addition, video and audio component data is stored in the MS. Each segment of the FLUTE session conforms to the ISO Base Media File Format rules.

  Note that SCS signaling information such as USD, MPD, SDP, FDD, SPD, and IS is described in a markup language such as XML, for example. Further, the IS may be transmitted as a video or audio stream instead of being transmitted as an SCS stream. Further, hereinafter, when there is no need to particularly distinguish LLS signaling information and SCS signaling information, they will be simply referred to as “signaling information”.

  Here, an RF channel ID (RF Channel ID) is assigned to a broadcast wave (RF Channel) having a predetermined frequency band, for example, for each broadcaster. Also, a BBP stream ID (BBP Stream ID) is assigned to one or a plurality of BBP streams transmitted in each broadcast wave. Furthermore, a service ID is assigned to one or a plurality of services transmitted in each BBP stream.

  As described above, the IP transmission system ID system includes a combination of a network ID (Network ID), a transport stream ID (Transport Stream ID), and a service ID (Service ID) used in the MPEG2-TS system ( A configuration corresponding to a triplet is adopted, and this triplet indicates a BBP stream configuration and a service configuration in the broadcast network.

  By using such an ID system, it is possible to achieve consistency with the currently widely used MPEG2-TS system. In the IP transmission system ID system, the RF channel ID and BBP stream ID correspond to the network ID and transport stream ID in the MPEG2-TS system.

<3. Specific use cases>

(1) Use case 1: Application control linked to recorded programs

  11 and 12 are diagrams for explaining use case 1. FIG. In FIG. 11 and FIG. 12, the time direction is from the left side to the right side in the drawing and is shown in another drawing, but it is continuous in time via the vertical dotted line L1 in the drawing. Suppose you are.

  11 and 12, the transmitter of the broadcast station (broadcaster) identified by the RF channel ID transmits the BBP stream identified by the BBP stream ID by a digital broadcast signal using the IP transmission method. Yes. In the BBP stream, AV content ("A / V" in the figure), SCS signaling information ("SCS" in the figure), metadata ("SCS" in the figure) that make up the service identified by the service ID, In addition, a stream of the application (“NRT” in the figure) is transmitted.

  Note that files transmitted in these streams are transmitted in a FLUTE session. In addition, trigger information (Trigger) is embedded in the video data constituting the AV content. 11 and 12, an application server (Application Server) provided on the Internet distributes applications, and a metadata server (Matadata Server) distributes metadata.

  In this use case 1, a recorded program such as a drama is transmitted as AV content ("A / V" in the figure) distributed from the transmitter. In FIG. 11, a receiver installed at each home or the like reproduces a recorded program by connecting to an A / V stream.

  The receiver reads the SCD from the memory, connects to the SCS stream transmitted by the broadcast wave according to the SCS Bootstrap information, and acquires the SCS signaling information (S11 in FIG. 11). Note that the receiver acquires LLS signaling information transmitted by LLS and records it in the memory during the initial scan processing. In the redistribution environment, when signaling information cannot be acquired, it is not necessary to acquire such information.

  Further, the receiver acquires the trigger information transmitted in the video stream at the timing when the transmitter transmits the trigger information (S12 in FIG. 11). This trigger information includes location information (Locator) and media time information (Media Time). The receiver sets the media time information included in the trigger information, and starts measuring the time based on the media time information (S13 in FIG. 11).

  Based on the USD included in the SCS signaling information acquired in the process of step S11 and the location information included in the trigger information acquired in the process of step S12, the receiver determines whether the metadata distribution route is broadcast or communication. Determine if there is. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the metadata is distributed by broadcasting, the receiver connects to the SCS stream according to SDP or FDD included in the SCS signaling information, and acquires the metadata file transmitted in the FLUTE session. (S14 in FIG. 11). On the other hand, when the metadata is distributed by communication, the receiver connects to the metadata server via the Internet according to the location information included in the trigger information, and acquires the metadata file (S14 in FIG. 11). .

  In this way, in the receiver, metadata distributed by broadcasting or communication is acquired. This metadata includes AIT, EMT, and CCT. The AIT includes application control information such as an organization ID (OrgID), an application ID (AppID), and an application URL (App_URL).

  In EMT, action information for each application is defined in time series. In the EMT of FIG. 11, as action information for the application 1 (App1), prefetch (Pref) at time T0, execute (Exec) at time T1, inject event (Inj_A_E) at time T2, and time T4. Suspend (Susp), execute at time T5 (Exec), and kill at time T6 (Kill). In the EMT of FIG. 11, prefetch (Pref) at time T3, execute (Exec) at time T4, and kill (Kill) at time T5 are defined as action information for application 2 (App2). Yes.

  The CCT includes cache control information such as the URL of each file constituting the PU for the application 1 and the application 2.

  Here, in the receiver, the time measurement based on the media time information is started in the process of step S13, but has this time reached the time specified in the action information for each EMT application? Whether or not (time has passed) is constantly monitored.

  When the time reaches the time T0, it is time to execute the prefetch action for the application 1 (App1) specified in the EMT, and the receiver follows the application ID (AppID) of the application 1 to execute the AIT To obtain the application URL of the application 1 (S15 in FIG. 11). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1. Here, for example, a file to be held in the cache memory is determined according to the capacity of the cache memory included in the receiver.

  Based on the USD included in the SCS signaling information acquired in the process of step S11, the application URL, and the application item URL (URL indicating the acquisition destination of the file stored in the cache memory), the receiver 1 ) Is determined to be broadcast or communication. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the application 1 (file) is distributed by broadcasting, the receiver connects to the NRT stream according to SDP, FDD, etc. included in the SCS signaling information and transmits the application 1 transmitted in the FLUTE session. A file is acquired (S15 in FIG. 11). On the other hand, when the application 1 (file) is distributed by communication, the receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 1 (S15 in FIG. 11).

  In this way, in the receiver, the application 1 (file) distributed by broadcasting or communication is acquired and held in the cache memory (Cache). The file of application 1 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  After that, when the measured time is time T1, it is time to execute an execute action for application 1 (App1) defined in EMT, so in the receiver, application 1 (held in cache memory) Are read and executed (S16 in FIG. 11). Thereby, in the receiver, the application 1 operates in conjunction with the recorded program.

  Next, when the measured time is time T2, it is time to execute the injection event action for application 1 (App1) defined in EMT. Ignites (S17 in FIG. 11). Thereby, in the receiver, for example, the display of the application 1 executed in conjunction with the recorded program is switched.

  After that, in FIG. 12, when the clocked time is time T3, the prefetch action for application 2 (App2) defined in EMT has arrived, so the receiver receives the application ID (AppID) of application 2 in the receiver. Accordingly, the application URL of the application 2 is acquired with reference to the AIT (S18 in FIG. 12). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory among the file group configuring the application 2. Here, for example, a file to be held in the cache memory is determined according to the capacity of the cache memory included in the receiver.

  Based on the USD included in the SCS signaling information acquired in step S11, the application URL, and the application item URL (URL indicating the acquisition destination of the file held in the cache memory), the receiver 2 ) Is determined to be broadcast or communication. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the application 2 (file) is distributed by broadcasting, the receiver connects to the NRT stream according to SDP, FDD, etc. included in the SCS signaling information and transmits the application 2 transmitted in the FLUTE session. A file is acquired (S18 in FIG. 12). On the other hand, when the application 2 is distributed by communication, the receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 2 (S18 in FIG. 12).

  In this way, in the receiver, the application 2 distributed by broadcasting or communication is acquired and held in the cache memory (Cache). Note that the file of the application 2 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  After that, when the measured time is time T4, it is time to execute the suspend action for application 1 (App1) and the execute action for application 2 (App2) as specified in EMT. The machine saves the running application 1 in the cache memory (Cache) (S19 in FIG. 12). Subsequently, in the receiver, the application 2 (file) held in the cache memory is read and executed (S19 in FIG. 12). As a result, in the receiver, the application 2 operates instead of the application 1 in conjunction with the recorded program.

  Also, when the timed time is time T5, it is time to execute the kill action for application 2 (App2) and the execute action for application 1 (App1) as specified in EMT. The machine ends the running application 2 (S20 in FIG. 12). Subsequently, in the receiver, the application 1 saved in the cache memory in the process of step S19 is read and executed (S20 in FIG. 12). Thereby, in the receiver, the application 2 that has been executed in conjunction with the recorded program is terminated, and the application 1 again operates in conjunction with the recorded program.

  Then, when the clocking time reaches time T6, it is time to execute the kill action for the application 1 (App1) defined in the EMT, so the application 1 being executed is terminated in the receiver (FIG. 12 S21). Thereby, in the receiver, the application 1 executed in conjunction with the recorded program is terminated, and only the recorded program is displayed.

  FIG. 13 shows the correspondence of each data in use case 1. FIG. 13 shows that metadata such as AIT and EMT is acquired according to location information included in the trigger information. In AIT and EMT, an application ID is associated. Furthermore, it is shown that the application is acquired according to the application URL of AIT.

  The use case 1 has been described above.

(2) Use case 2: Application control linked to a live program

  14 and 15 are diagrams illustrating use case 2. FIG. In FIGS. 14 and 15, the time direction is from the left side to the right side in the drawing and is shown in another drawing, but it is continuously in time via the vertical dotted line L2 in the drawing. It shall be.

  14 and 15, the transmitter of the broadcasting station (broadcasting company) transmits the BBP stream by the broadcast wave of the digital broadcast using the IP transmission method, as in FIG. 11 and the like described above. In this BBP stream, AV content ("A / V" in the figure), SCS signaling information ("SCS" in the figure), metadata ("SCS" in the figure), and application (Figure) "NRT") is being transmitted.

  Note that files transmitted in these streams are transmitted in a FLUTE session. In addition, trigger information (Trigger) is embedded in the video data constituting the AV content. In FIGS. 14 and 15, an application server (Application Server) provided on the Internet distributes applications, and a metadata server (Matadata Server) distributes metadata.

  In this use case 2, a live program such as a sports broadcast is transmitted as AV content (“A / V” in the figure) distributed from the transmitter. In FIG. 14, a receiver installed in each home or the like is playing a live program by connecting to an A / V stream.

  The receiver reads the SCD from the memory, connects to the SCS stream transmitted by the broadcast wave according to the SCS Bootstrap information, and acquires the SCS signaling information (S31 in FIG. 14). In the redistribution environment, when signaling information cannot be acquired, it is not necessary to acquire such information.

  Further, the receiver acquires the trigger information transmitted in the video stream at the timing when the transmitter transmits the trigger information (S32 in FIG. 14). This trigger information includes location information (Locator). Also, prefetch is added to the location information as action information for the application 1 (App1).

  Based on the USD included in the SCS signaling information acquired in the process of step S31 and the location information included in the trigger information acquired in the process of step S32, the receiver determines whether the metadata distribution route is broadcast or communication. Determine if there is. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the metadata is distributed by broadcasting, the receiver connects to the SCS stream according to SDP or FDD included in the SCS signaling information, and acquires the metadata file transmitted in the FLUTE session. (S33 in FIG. 14). On the other hand, when the metadata is distributed by communication, the receiver connects to the metadata server via the Internet according to the location information included in the trigger information, and acquires the metadata file (S33 in FIG. 14). .

  In this way, in the receiver, metadata distributed by broadcasting or communication is acquired. This metadata includes AIT and CCT. The AIT includes application control information such as an organization ID (OrgID), an application ID (AppID), and an application URL (App_URL). The CCT includes cache control information such as the URL of each file constituting the PU for the application 1 and the application 2.

  Further, the receiver refers to the AIT according to the application ID (AppID) of the application 1 (App1) that is the target of the prefetch action added to the location information included in the trigger information, and acquires the application URL of the application 1 (S34 in FIG. 14). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1.

  Based on the USD included in the SCS signaling information acquired in the process of step S31, the application URL, and the application item URL (URL indicating the acquisition destination of the file held in the cache memory), the receiver distributes the distribution path of the application 1. Is broadcast or communication. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the application 1 (file) is distributed by broadcasting, the receiver connects to the NRT stream according to SDP, FDD, etc. included in the SCS signaling information and transmits the application 1 transmitted in the FLUTE session. A file is acquired (S34 in FIG. 14). On the other hand, when the application 1 (file) is distributed by communication, the receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 1 (S34 in FIG. 14).

  In this way, in the receiver, the application 1 (file) distributed by broadcasting or communication is acquired and held in the cache memory (Cache). The file of application 1 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  Thereafter, the receiver monitors whether or not the trigger information is transmitted in the video stream, and acquires the trigger information at a timing when the transmitter transmits the trigger information (S35 in FIG. 14). In this trigger information, an execute action for application 1 (App1) is added to the location information. The receiver reads and executes the application 1 held in the cache memory after confirming with reference to the AIT according to the trigger information (S36 in FIG. 14). Thereby, in the receiver, the application 1 operates in conjunction with the live program.

  In the receiver, it is always monitored whether or not the trigger information is transmitted in the video stream, and the trigger information is acquired at the timing when the transmitter transmits the trigger information (S37 in FIG. 14). In the trigger information, an injection event action for application 1 (App1) is added to the location information. According to the trigger information, the receiver fires an event for the running application 1 after confirming with reference to the AIT (S38 in FIG. 14). Thereby, in the receiver, for example, the display of the application 1 being executed in conjunction with the live program is switched.

  Thereafter, in FIG. 15, the receiver acquires the trigger information at the timing when the transmitter transmits the trigger information (S39 in FIG. 15). In this trigger information, a prefetch action for application 2 (App2) is added to the location information. The receiver refers to the AIT according to the application ID (AppID) of the application 2 added to the location information and acquires the application URL of the application 2 (S40 in FIG. 15). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1.

  Based on the USD included in the SCS signaling information acquired in the process of step S31, the application URL, and the application item URL (URL indicating the acquisition destination of the file held in the cache memory), the receiver distributes the distribution path of the application 2. Is either broadcast or communication. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the application 2 is distributed by broadcasting, the receiver acquires the file of the application 2 transmitted in the FLUTE session by connecting to the NRT stream according to SDP, FDD, etc. included in the SCS signaling information. (S40 in FIG. 15). On the other hand, when the application 2 is distributed by communication, the receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 2 (S40 in FIG. 15).

  In this way, in the receiver, the application 2 distributed by broadcasting or communication is acquired and held in the cache memory (Cache). Note that the file of the application 2 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  Thereafter, the receiver acquires the trigger information at the timing when the transmitter transmits the trigger information (S41 in FIG. 15). In this trigger information, a suspend action for application 1 (App1) and an execute action for application 2 (App2) are added to the location information.

  First, according to the suspend action for the application 1 added to the location information, the receiver refers to the AIT and confirms it, and then saves the running application 1 in the cache memory (Cache) (S42 in FIG. 15). . Subsequently, the receiver reads and executes the application 2 held in the cache memory after confirming with reference to the AIT according to the execute action for the application 2 added to the location information (FIG. 15). S42). Thereby, in the receiver, the application 2 operates instead of the application 1 in conjunction with the live program.

  In the receiver, the trigger information is acquired at the timing when the transmitter transmits the trigger information (S43 in FIG. 15). In this trigger information, a kill action for application 2 (App2) and an execute action for application 1 (App1) are added to the location information.

  First, according to the kill action for the application 2 added to the location information, the receiver confirms with reference to the AIT, and then ends the application 2 being executed (S44 in FIG. 15). Subsequently, the receiver follows the execute action for the application 1 added to the location information, confirms by referring to the AIT, reads the application 1 saved in the cache memory in the process of step S42, and Execution is resumed (S44 in FIG. 15). Thereby, in the receiver, the application 2 executed in conjunction with the live program is terminated, and the application 1 operates again in conjunction with the live program.

  In the receiver, the trigger information is acquired at the timing when the transmitter transmits the trigger information (S45 in FIG. 15). In this trigger information, a kill action for application 1 (App1) is added to the location information. In accordance with the kill action for the application 1 added to the location information, the receiver refers to the AIT and confirms it, and then ends the running application 1. Thereby, in the receiver, the application 1 that has been executed in conjunction with the live program is terminated, and only the live program is displayed.

  FIG. 16 shows the correspondence of each data in use case 2. FIG. 16 shows that metadata such as AIT is acquired according to location information included in the trigger information. Further, it is indicated that the application is acquired according to the application URL of AIT.

  The use case 2 has been described above.

(3) Use case 3: Control of hybrid application

  17 and 18 are diagrams for explaining use case 3. FIG. In FIG. 17 and FIG. 18, the time direction is the direction from the left side to the right side in the figure, and is shown in another drawing, but it is continuous in time via the vertical dotted line L3 in the figure. It shall be.

  In FIG. 17 and FIG. 18, the transmitter of the broadcast station (broadcasting company) transmits the BBP stream by the broadcast wave of the digital broadcast using the IP transmission method, as in FIG. In this BBP stream, AV content ("A / V" in the figure), SCS signaling information ("SCS" in the figure), metadata ("SCS" in the figure), and application (Figure) "NRT") is being transmitted.

  Note that files transmitted in these streams are transmitted in a FLUTE session. In addition, trigger information (Trigger) is embedded in the video data constituting the AV content. In FIG. 17 and FIG. 18, an application server (Application Server) provided on the Internet distributes applications, and a metadata server (Matadata Server) distributes metadata.

  In FIG. 17, a receiver installed in each home or the like reproduces a program by connecting to an A / V stream. The receiver reads the SCD from the memory, connects to the SCS stream transmitted by the broadcast wave according to the SCS Bootstrap information, and acquires the SCS signaling information (S51 in FIG. 17). In the redistribution environment, when signaling information cannot be acquired, it is not necessary to acquire such information.

  Further, the receiver acquires the trigger information transmitted in the video stream at the timing when the transmitter transmits the trigger information (S52 in FIG. 17). This trigger information includes location information (Locator) and media time information (Media Time). The receiver sets the media time information included in the trigger information and starts measuring the time based on the media time information (S53 in FIG. 17).

  Based on the USD included in the SCS signaling information acquired in the process of step S51 and the location information included in the trigger information acquired in the process of step S52, the receiver determines whether the metadata distribution route is broadcast or communication. Determine if there is. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the metadata is distributed by broadcasting, the receiver connects to the SCS stream according to SDP or FDD included in the SCS signaling information, and acquires the metadata file transmitted in the FLUTE session. (S54 in FIG. 17). On the other hand, when the metadata is distributed by communication, the receiver connects to the metadata server via the Internet according to the location information included in the trigger information, and acquires the metadata file (S54 in FIG. 17). .

  In this way, in the receiver, metadata distributed by broadcasting or communication is acquired. This metadata includes AIT, EMT, and CCT. The AIT includes application control information such as an organization ID (OrgID), an application ID (AppID), and an application URL (App_URL).

  In EMT, action information for each application is defined in time series. In the EMT of FIG. 17, as actions for application 1 (App1), prefetch (Pref) at time T0, execute (Exec) at time T1, inject event (Inj_A_E) at time T2, and at time T3 Kill is defined.

  The CCT includes cache control information such as the URL of each file constituting the PU for the application 1.

  Here, in the receiver, the time measurement based on the media time information is started in the process of step S53. Has the time measured become the time specified in the action information for each EMT application? Whether or not (time has passed) is constantly monitored.

  When the time reaches the time T0, it is time to execute the prefetch action for the application 1 (App1) defined in the EMT, so the receiver follows the application ID (AppID) of the application 1 according to the AIT. Referring to FIG. 17, the application URL of application 1 is acquired (S55 in FIG. 17). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1.

  Based on the USD included in the SCS signaling information acquired in the process of step S51, the application URL, and the application item URL (URL indicating the acquisition destination of the file held in the cache memory), the receiver 1 ) Is determined to be broadcast or communication. In the redistribution environment, when the signaling information cannot be acquired, it may be determined that the distribution route is communication only.

  When the application 1 (file) is distributed by broadcasting, the receiver connects to the NRT stream according to SDP, FDD, etc. included in the SCS signaling information and transmits the application 1 transmitted in the FLUTE session. A file is acquired (S55 in FIG. 17). On the other hand, when the application 1 (file) is distributed by communication, the receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 1 (S55 in FIG. 17).

  In this way, in the receiver, the application 1 (file) distributed by broadcasting or communication is acquired and held in the cache memory (Cache). The file of application 1 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  Thereafter, the receiver acquires the trigger information at the timing at which the transmitter transmits the trigger information (S56 in FIG. 17). In this trigger information, event information for updating the execution time of the execute action for the application 1 (App1) from the time T1 to the time T1A is added to the location information. In accordance with the event information included in the trigger information, the receiver updates the execution time of the execute action for the application 1 stipulated in EMT from time T1 to time T1A (S57 in FIG. 17).

  When the time measured becomes the updated time T1A, it is time to execute the execute action for the application 1 specified in the EMT, so that the receiver 1 stores the application 1 held in the cache memory. It is read out and executed (S58 in FIG. 17). Thereby, in the receiver, the application 1 operates in conjunction with the program.

  Thereafter, in FIG. 18, the receiver acquires the trigger information at the timing when the transmitter transmits the trigger information (S59 in FIG. 18). In this trigger information, event information for deleting the injection event action at time T2 for the application 1 (App1) is added to the location information. In accordance with the event information included in the trigger information, the receiver deletes the injection event action at time T2 for application 1 (App1) defined in EMT (S60 in FIG. 18).

  In the receiver, the trigger information is acquired at the timing when the transmitter transmits the trigger information (S61 in FIG. 18). In the trigger information, an injection event action for application 1 (App1) is added to the location information. According to the trigger information, the receiver fires an event for the running application 1 after confirming with reference to the AIT (S62 in FIG. 18). Thereby, in the receiver, for example, the display of the application 1 executed in conjunction with the program is switched. That is, here, the event for the application 1 is fired at the time after the change specified in the event information included in the trigger information, not at the time specified in advance in the EMT.

  After that, when the measured time reaches time T3, it is time to execute the kill action for the application 1 (App1) defined in the EMT, so the application 1 being executed is terminated in the receiver (see FIG. 18 S63). Thereby, in the receiver, the application 1 executed in conjunction with the program is terminated, and only the program is displayed.

  The use case 3 has been described above.

(4) Use case 4: Application control linked to recorded programs (ACR compatible)

  FIG. 19 is a diagram for explaining use case 4.

  In FIG. 19, similarly to FIG. 11 and the like described above, the transmitter of the broadcasting station (broadcasting company) transmits the BBP stream by the broadcast wave of the digital broadcast using the IP transmission method. In this BBP stream, a stream of AV content (“A / V” in the figure) constituting the service is transmitted. Note that the file transmitted in the stream is transmitted in the FLUTE session.

  In FIG. 19, an application server (Application Server) provided on the Internet distributes applications, and a metadata server (Matadata Server) distributes metadata. In addition, an ACR Server (ACR Server) is provided on the Internet, and in response to inquiries from receivers, AV content is identified using ACR (Automatic Content Recognition) technology, and depending on the identification result Provide trigger information.

  In this use case 4, a recorded program such as a drama is transmitted as AV content ("A / V" in the figure) distributed from the transmitter. In FIG. 19, a receiver installed in each home or the like reproduces a recorded program by connecting to an A / V stream.

  The receiver transmits a feature amount (hereinafter referred to as “finger print”) extracted from at least one of the video data and audio data of the recorded program being played to the ACR server via the Internet. (S71). This fingerprint information is transmitted from the receiver to the ACR server, for example, every few seconds.

  When the ACR server receives fingerprint information from the receiver, the ACR server uses the ACR technology to identify the recorded program being played back by the receiver by comparing the fingerprint information with the database. The corresponding trigger information is generated. The ACR server transmits trigger information corresponding to the ACR identification result to the receiver via the Internet.

  Here, instead of the fingerprint information, watermark information (Water Mark) may be used. When the watermark information is used, information for specifying the program scene can be included. In this case, it is not necessary to specify the program scene on the ACR server side.

  Then, the receiver receives and acquires trigger information transmitted from the ACR server via the Internet (S72). This trigger information includes location information (Locator) and media time information (Media Time). The receiver sets the media time information included in the trigger information and starts measuring the time based on the media time information (S73).

  Further, the receiver connects to the metadata server via the Internet in accordance with the location information included in the trigger information acquired in step S72, and acquires a metadata file (S74). This metadata includes AIT, EMT, and CCT. The AIT includes application control information such as an organization ID (OrgID), an application ID (AppID), and an application URL (App_URL).

  In EMT, action information for each application is defined in time series. In the EMT of FIG. 19, the action information for application 1 (App1) includes prefetch (Prep) at time T0, execute (Exec) at time T1, inject event (Inj_A_E) at time T2, and time T4. Suspend (Susp), execute at time T5 (Exec), and kill at time T6 (Kill). In the EMT of FIG. 19, prefetch (Prep) at time T3, execute (Exec) at time T4, and kill (Kill) at time T5 are defined as action information for application 2 (App2). Yes.

  The CCT includes cache control information such as the URL of each file constituting the PU for the application 1 and the application 2.

  Here, in the receiver, the time measurement based on the media time information is started in the process of step S73, but has the time measured become the time specified in the action information for each EMT application? Whether or not (time has passed) is constantly monitored.

  When the time reaches the time T0, it is time to execute the prefetch action for the application 1 (App1) specified in the EMT, so the receiver follows the application ID (AppID) of the application 1 according to the application ID (AppID). To obtain the application URL of the application 1 (S75). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1.

  The receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 1 (S75). In this way, in the receiver, the application 1 distributed by communication is acquired and held in the cache memory (Cache). The file of application 1 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  After that, when the measured time is time T1, it is time to execute an execute action for application 1 (App1) defined in EMT. Therefore, in the receiver, application 1 held in the cache memory is It is read and executed (S76). Thereby, in the receiver, the application 1 operates in conjunction with the recorded program.

  The subsequent operation of the application 1 is not shown in FIG. 19, but the injection event action for the application 1 (App1) defined in the EMT is executed when the measured time reaches the time T2. In the receiver, an event for the application 1 being executed is fired.

  In addition, when the time measurement time reaches time T3, the prefetch for application 2 (App2) specified in EMT is executed, so the receiver uses the Internet according to the application URL for acquiring application 2. To the application server, and obtain the file of application 2. The application 2 is held in a cache memory (Cache).

  After that, when the measured time reaches time T4, the suspend action for application 1 (App1) specified in EMT and the execute action for application 2 (App2) are simultaneously executed. Saves the running application 1 in a cache memory (Cache). Subsequently, in the receiver, the application 2 held in the cache memory is read and executed.

  In addition, when the measured time is time T5, the kill action for application 2 (App2) specified in EMT and the execute action for application 1 (App1) are executed at the same time. Terminates the running application 2. Subsequently, in the receiver, the application 1 saved in the cache memory is read and executed.

  Then, when the clocking time reaches time T6, the timing for executing the kill action for the application 1 (App1) defined in the EMT is reached, so the application 1 being executed is terminated in the receiver. Thereby, in the receiver, the application 1 executed in conjunction with the recorded program is terminated, and only the recorded program is displayed.

  FIG. 20 shows the correspondence between the data in use case 4. In FIG. 20, the trigger information is not transmitted as a video stream or the like, but is acquired as a result of the inquiry by transmitting fingerprint information or watermark information to the ACR server.

  FIG. 20 shows that metadata such as AIT and EMT is acquired according to location information included in the trigger information. In AIT and EMT, an application ID is associated. Furthermore, it is shown that the application is acquired according to the application URL of AIT.

  The use case 4 has been described above.

(5) Use case 5: Application control linked to live programs (ACR compatible)

  FIG. 21 is a diagram for explaining use case 5.

  In FIG. 21, similarly to the above-described FIG. 11 and the like, a transmitter of a broadcasting station (broadcasting company) transmits a BBP stream by a broadcast wave of digital broadcasting using an IP transmission method. In this BBP stream, a stream of AV content (“A / V” in the figure) constituting each service is transmitted in a FLUTE session.

  In FIG. 21, an application server (Application Server) provided on the Internet distributes applications, and a metadata server (Matadata Server) distributes metadata. An ACR server provides trigger information according to the AV content identification result using the ACR technology.

  In this use case 5, a live program such as a sports broadcast is transmitted as AV content (“A / V” in the figure) distributed from the transmitter. In FIG. 21, a receiver installed in each home or the like reproduces a live program by connecting to an A / V stream.

  In FIG. 21, the receiver transmits fingerprint information extracted from at least one of video data and audio data of a live program being reproduced to the ACR server via the Internet (S81).

  When the ACR server receives fingerprint information from the receiver, the ACR server identifies the live program being played on the receiver by using the ACR technology by comparing the fingerprint information with the database, and according to the identification result. Generated trigger information. The ACR server transmits trigger information to the receiver via the Internet. Note that watermark information may be used instead of fingerprint information.

  Thereby, the receiver receives and acquires the trigger information transmitted from the ACR server via the Internet (S82). This trigger information includes location information. Further, a prefetch action is added to the location information as action information for the application 1 (App1). The receiver connects to the metadata server via the Internet in accordance with the location information included in the trigger information acquired in step S82, and acquires a metadata file (S83). This metadata includes AIT and CCT. The AIT includes application control information such as an organization ID (OrgID), an application ID (AppID), and an application URL (App_URL). The CCT includes cache control information such as the URL of each file constituting the PU for the application 1 and the like.

  The receiver refers to the AIT according to the application ID (AppID) of the application 1 (App1) that is the target of the prefetch action added to the location information included in the trigger information, and acquires the application URL of the application 1 (S84). ). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1.

  The receiver connects to the application server via the Internet according to the application URL and the application item URL (URL indicating the acquisition destination of the file held in the cache memory), and acquires the file of the application 1 (S84). In this way, in the receiver, the application 1 distributed by communication is acquired and held in the cache memory (Cache). The file of application 1 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  After that, at the receiver, the fingerprint information extracted from the live program being played is periodically (for example, several seconds cycle) transmitted to the ACR server via the Internet, and trigger information corresponding to the ACR identification result is acquired. (S85). In this trigger information, an execute action for application 1 (App1) is added to the location information. The receiver reads and executes the application 1 held in the cache memory after confirming with reference to the AIT according to the trigger information (S86). Thereby, in the receiver, the application 1 operates in conjunction with the live program.

  The subsequent operation of the application 1 is not shown in FIG. 21, but after that, in the receiver, the fingerprint information extracted from the live program being played is periodically (for example, a cycle of several seconds). The trigger information is acquired by being transmitted to the ACR server via the Internet. In this trigger information, when an injection event action for the application 1 (App1) is added to the location information, the receiver fires an event for the application 1 being executed according to the trigger information.

  If the prefetch action for application 2 (App2) is specified in the acquired trigger information, the receiver connects to the application server via the Internet according to the trigger information, and the file of application 2 is acquired. And held in a cache memory (Cache).

  Further, in the acquired trigger information, when the suspend action for the application 1 (App1) and the execute action for the application 2 (App2) are specified, the running application 1 is saved in the cache memory and cached. The application 2 held in the memory is read and executed.

  Also, in the acquired trigger information, when the kill action for application 2 (App2) and the execute action for application 1 (App1) are specified, the running application 2 is terminated and saved in the cache memory. The existing application 1 is read and its execution is resumed. If the acquired trigger information includes a kill action for the application 1 (App1), the receiver 1 terminates the application 1 being executed.

  FIG. 22 shows the correspondence of each data in use case 5. In FIG. 22, the trigger information is not transmitted as a video stream or the like, but is acquired as a result of the inquiry by transmitting fingerprint information or watermark information to the ACR server.

  FIG. 22 shows that metadata such as AIT is acquired according to location information included in the trigger information. Further, it is indicated that the application is acquired according to the application URL of AIT.

  The use case 5 has been described above.

(6) Use case 6: Application control using SCS signaling information

  FIG. 23 is a diagram for explaining use case 6.

  In FIG. 23, similarly to the above-described FIG. 11 and the like, the transmitter of the broadcasting station (broadcasting company) transmits the BBP stream by the broadcast wave of the digital broadcast using the IP transmission method. In this BBP stream, a stream of AV contents (“A / V” in the figure), SCS signaling information (“SCS” in the figure), and application (“NRT” in the figure) constituting the service is transmitted. . Note that files transmitted in these streams are transmitted in a FLUTE session.

  In FIG. 23, an application server (Application Server) provided on the Internet distributes applications. In FIG. 23, although a metadata server (Matadata Server) is illustrated, it is assumed that metadata is not distributed.

  However, in use case 6, metadata (AIT, CCT, etc.) is included in the SCS signaling information. In use case 6, since trigger information is not used, trigger information is not embedded in video data or the like, and an ACR server that can provide trigger information is not provided.

  In FIG. 23, a receiver installed in each home or the like reproduces a program by connecting to an A / V stream. The receiver reads the SCD from the memory, connects to the SCS stream transmitted by the broadcast wave according to the SCS Bootstrap information, and acquires the SCS signaling information (S91). This SCS signaling information includes AIT and CCT in addition to USD and the like. The AIT in FIG. 23 includes prefetch (Prefetch) as action information in addition to an organization ID (OrgID), an application ID (AppID), and an application URL (App_URL). The CCT also includes cache control information such as the URL of each file that constitutes the PU for the application 1.

  The receiver refers to the AIT and acquires an application URL corresponding to the application ID (AppID) of the application 1 (App1) that is the target of the prefetch action (S92). In addition, the receiver refers to the CCT and determines a file to be held in the cache memory from among the file group constituting the application 1.

  Based on the USD included in the SCS signaling information acquired in the process of step S91, the application URL, and the application item URL (URL indicating the acquisition destination of the file held in the cache memory), the receiver distributes the distribution path of the application 1. Is broadcast or communication.

  When the application 1 (file) is distributed by broadcasting, the receiver connects to the NRT stream according to SDP, FDD, etc. included in the SCS signaling information and transmits the application 1 transmitted in the FLUTE session. A file is acquired (S92). On the other hand, when the application 1 (file) is distributed by communication, the receiver connects to the application server via the Internet according to the application URL or the like, and acquires the file of the application 1 (S92).

  In this way, in the receiver, the application 1 (file) distributed by broadcasting or communication is acquired and held in the cache memory (Cache). The file of application 1 held in the cache memory is based on the capacity of the cache memory and the CCT as cache control information.

  Thereafter, the receiver monitors whether the AIT and CCT included in the SCS signaling information transmitted in the SCS stream is updated, and when at least one of the AIT and CCT is updated, the SCS signaling including the AIT and CCT is updated. Information is acquired (S93). In this AIT, an execute action for application 1 (App1) is designated. The receiver reads and executes the application 1 held in the cache memory according to the AIT (S94). Thereby, in the receiver, the application 1 operates in conjunction with the program.

  Further, the receiver continues to monitor the update of AIT and CCT, and when at least one of AIT and CCT is updated, SCS signaling information including the AIT and CCT is acquired (S95). In this AIT, a kill action for application 1 (App1) is designated. The receiver terminates the running application 1 according to the AIT. Thereby, in the receiver, the application 1 executed in conjunction with the program is terminated and only the program is displayed.

  The use case 6 has been described above.

<4. System configuration>

(Configuration example of broadcasting communication system)
FIG. 24 is a diagram illustrating a configuration example of a broadcast communication system. The system means a set of a plurality of components (devices and the like).

  The broadcast communication system 1 in FIG. 24 has a configuration for realizing the use cases 1 to 6 described above. That is, in FIG. 24, the broadcast communication system 1 includes a transmission device 10, a reception device 20, an application server 30, a metadata server 40, and an ACR server 50. The receiving device 20 is connected to the application server 30, the metadata server 40, and the ACR server 50 via the Internet 90.

  The transmission device 10 transmits AV content such as a recorded program and a live program and signaling information using a digital broadcast signal. Further, the transmission device 10 transmits the trigger information, metadata, or application included in the digital broadcast signal. The transmission device 10 corresponds to the above-described transmitter, and is provided by, for example, a broadcaster and disposed in the broadcast station.

  The receiving device 20 receives a digital broadcast signal transmitted from the transmitting device 10. The receiving device 20 acquires and outputs AV content video and audio based on signaling information obtained from the digital broadcast signal. The receiving device 20 receives a digital broadcast signal from the transmitting device 10 and acquires trigger information, metadata, or an application.

  The receiving device 20 connects to the application server 30 via the Internet 90 and acquires an application. Further, the receiving device 20 connects to the metadata server 40 via the Internet 90 and acquires metadata.

  The receiving device 20 controls the operation of the application acquired through broadcasting or communication based on the signaling information, trigger information, and metadata acquired through broadcasting or communication. The receiving device 20 is a television receiver or the like corresponding to the above-described receiver, and is disposed in the home.

  The application server 30 distributes the application to the receiving device 20 via the Internet 90 in response to a request from the receiving device 20. The application server 30 corresponds to the above-described application server (“Application Server” in FIG. 11 and the like), and is installed by, for example, a broadcaster.

  The metadata server 40 distributes metadata to the receiving device 20 via the Internet 90 in response to a request from the receiving device 20. Note that the metadata server 40 corresponds to the above-described metadata server (“Matadata Server” in FIG. 11 and the like), and is installed by, for example, a broadcaster.

  Further, the receiving apparatus 20 inquires about trigger information by connecting to the ACR server 50 via the Internet 90. At that time, the receiving device 20 transmits fingerprint information to the ACR server 50. The receiving device 20 acquires trigger information transmitted from the ACR server 50, and controls the operation of the application based on the trigger information.

  The ACR server 50 performs ACR processing on the fingerprint information in response to an inquiry from the receiving device 20 and identifies AV content reproduced by the receiving device 20. The ACR server 50 generates trigger information corresponding to the ACR identification result, and transmits the trigger information to the receiving device 20 via the Internet 90. The ACR server 50 corresponds to the above-described ACR server (“ACR Server” in FIG. 19 and the like), and is installed by, for example, a broadcaster.

  The broadcast communication system 1 is configured as described above. Next, a configuration example of each device configuring the broadcast communication system 1 of FIG. 24 will be described.

(Configuration example of transmitter)
FIG. 25 is a diagram illustrating a configuration example of the transmission apparatus in FIG.

  25, the transmission apparatus 10 includes a signaling information generation unit 111, a signaling information processing unit 112, a metadata generation unit 113, a metadata processing unit 114, an audio data acquisition unit 115, an audio encoder 116, a video data acquisition unit 117, and a video. The encoder 118 includes a trigger information generation unit 119, a multiplexing unit 120, and a transmission unit 121.

  The signaling information generation unit 111 generates signaling information and supplies it to the signaling information processing unit 112. The signaling information processing unit 112 processes the signaling information supplied from the signaling information generation unit 111 and supplies it to the multiplexing unit 120.

  The metadata generation unit 113 generates metadata and supplies it to the metadata processing unit 114. The metadata processing unit 114 processes the metadata supplied from the metadata generation unit 113 and supplies the processed metadata to the multiplexing unit 120.

  The audio data acquisition unit 115 acquires audio data of AV content from an external server, microphone, recording medium, or the like, and supplies the audio data to the audio encoder 116. The audio encoder 116 encodes the audio data supplied from the audio data acquisition unit 115 in accordance with an encoding method such as MPEG (Moving Picture Experts Group) and supplies the encoded data to the multiplexing unit 120.

  The video data acquisition unit 117 acquires video data of AV content from an external server, camera, recording medium, or the like, and supplies it to the video encoder 118 and the trigger information generation unit 119. The video encoder 118 encodes the video data supplied from the video data acquisition unit 117 in accordance with an encoding method such as MPEG, and supplies the encoded video data to the multiplexing unit 120.

  The trigger information generation unit 119 generates trigger information in accordance with the progress of the AV content corresponding to the video data supplied from the video data acquisition unit 117, and supplies the trigger information to the video encoder 118 or the multiplexing unit 120. When encoding the video data, the video encoder 118 can embed the trigger information supplied from the trigger information generation unit 119 in the video data and encode the video data.

  The multiplexing unit 120 multiplexes the signaling information from the signaling information processing unit 112, the metadata from the metadata processing unit 114, the audio data from the audio encoder 116, and the video data from the video encoder 118, The BBP stream obtained as a result is supplied to the transmission unit 121.

  When the trigger information is supplied from the trigger information generation unit 119, the multiplexing unit 120 further multiplexes the trigger information with the audio data and the video data to generate a BBP stream. Further, the metadata does not necessarily need to be transmitted when the distribution route is communication. In this case, the metadata does not have to be included in the BBP stream. Further, although not shown in the configuration of FIG. 25, the application may be transmitted by being included in the BBP stream.

  The transmission unit 121 transmits the BBP stream supplied from the multiplexing unit 120 as a digital broadcast signal via the antenna 122.

  In FIG. 25, the case where the trigger information is embedded in the video data and the case where the trigger information is multiplexed in the BBP stream are illustrated. However, for example, the trigger information is embedded by other methods such as embedding the trigger information in audio data. Information may be arranged.

(Configuration example of receiving device)
FIG. 26 is a diagram illustrating a configuration example of the reception apparatus in FIG.

  26, the receiving apparatus 20 includes a tuner 212, a demultiplexing unit 213, an audio decoder 214, an audio output unit 215, a video decoder 216, a video output unit 217, a control unit 218, a memory 219, an input unit 220, a communication unit 221, An application engine 222 and a cache memory 223 are included.

  The tuner 212 selects and demodulates a digital broadcast signal received via the antenna 211, and supplies a BBP stream obtained as a result to the demultiplexing unit 213. The demultiplexing unit 213 separates the BBP stream supplied from the tuner 212 into audio data, video data, signaling information, and metadata. The demultiplexing unit 213 supplies audio data to the audio decoder, video data to the video decoder, and signaling information and metadata to the control unit 218, respectively.

  The audio decoder 214 decodes the audio data supplied from the demultiplexing unit 213 by a decoding method corresponding to the encoding method by the audio encoder 116 (FIG. 25), and the resulting audio data is converted into the audio output unit 215 and It supplies to the control part 218.

  The audio output unit 215 outputs the audio data supplied from the audio decoder 214 to a speaker (not shown). The speaker outputs sound corresponding to the audio data supplied from the audio output unit 215.

  The video decoder 216 decodes the video data supplied from the demultiplexing unit 213 by a decoding method corresponding to the encoding method by the video encoder 118 (FIG. 25), and the resulting video data is converted into the video output unit 217 and It supplies to the control part 218.

  The video output unit 217 outputs the video data supplied from the video decoder 216 to a display (not shown). The display displays video corresponding to the video data supplied from the video output unit 217.

  The control unit 218 controls the operation of each unit of the receiving device 20 such as the tuner 212, the demultiplexing unit 213, and the communication unit 221. The memory 219 stores various data supplied from the control unit 218. The input unit 220 receives an operation from the user and supplies an operation signal corresponding to the operation to the control unit 218.

  In addition, the control unit 218 acquires signaling information and metadata supplied from the demultiplexing unit 213. Further, the control unit 218 acquires trigger information or fingerprint information based on the audio data supplied from the audio decoder 214 or the video data supplied from the video decoder 216. The control unit 218 supplies fingerprint information to the communication unit 221.

  The communication unit 221 connects to the application server 30 via the Internet 90 according to control from the control unit 218 and requests an application. The communication unit 221 acquires an application transmitted from the application server 30 via the Internet 90 and stores it in the cache memory 223.

  In addition, the communication unit 221 connects to the metadata server 40 via the Internet 90 according to control from the control unit 218 and requests metadata. The communication unit 221 acquires metadata transmitted from the metadata server 40 via the Internet 90 and supplies the metadata to the control unit 218.

  Further, the communication unit 221 connects to the ACR server 50 via the Internet 90 according to control from the control unit 218, transmits fingerprint information, and inquires about trigger information. The communication unit 221 acquires trigger information transmitted from the ACR server 50 via the Internet 90 and supplies the trigger information to the control unit 218.

  The control unit 218 controls the operation of the application acquired through broadcasting or communication based on the signaling information, trigger information, and metadata acquired through broadcasting or communication. The application engine 222 reads and executes the application held in the cache memory 223 according to the control from the control unit 218. The application engine 222 controls operations such as application pause (interruption), event firing, and termination according to control from the control unit 218.

  The video data of the application is supplied to the video output unit 217. The video output unit 217 combines the video data supplied from the application engine 222 with the video data supplied from the video decoder 216, and displays a video obtained thereby on the display.

  Although not shown in the configuration of FIG. 26, when the application distribution route is broadcast and the application is included in the BBP stream and transmitted, the application separated by the demultiplexing unit 213 is stored in the cache memory 223. Will be held.

(Configuration example of control unit)
FIG. 27 is a diagram illustrating a functional configuration example of a part that performs processing related to application control in the control unit 218 in FIG.

  In FIG. 27, the control unit 218 includes a signaling information acquisition unit 251, a trigger information acquisition unit 252, a metadata acquisition unit 253, a fingerprint information acquisition unit 254, an analysis unit 255, a media time timing unit 256, and an application control unit 257. Consists of

  The signaling information acquisition unit 251 connects to the SCS stream according to the SCS Bootstrap information, acquires the SCS signaling information, and supplies it to the analysis unit 255.

  The trigger information acquisition unit 252 constantly monitors the video data supplied from the video decoder 216, acquires trigger information embedded in the video data, and supplies the trigger information to the analysis unit 255. The trigger information acquisition unit 252 supplies the media time information to the media time timing unit 256 when the media time information is included in the trigger information.

  When the trigger information is arranged in the BBP stream, the trigger information acquisition unit 252 monitors the packet including the trigger information separated by the demultiplexing unit 213 and acquires the trigger information therefrom. .

  The metadata acquisition unit 253 acquires metadata distributed by broadcasting or communication according to the analysis result by the analysis unit 255 and supplies the metadata to the analysis unit 255.

  The fingerprint information acquisition unit 254 acquires (extracts) fingerprint information from at least one of the audio data supplied from the audio decoder 214 and the video data supplied from the video decoder 216, and supplies the fingerprint information to the communication unit 221. . The communication unit 221 connects to the ACR server 50 via the Internet 90 and transmits fingerprint information. The communication unit 221 receives trigger information transmitted from the ACR server 50 and supplies the trigger information to the trigger information acquisition unit 252. The trigger information acquisition unit 252 acquires the trigger information supplied from the communication unit 221 and supplies it to the analysis unit 255.

  The analysis unit 255 is supplied with signaling information from the signaling information acquisition unit 251, trigger information from the trigger information acquisition unit 252, and metadata from the metadata acquisition unit 253. The analysis unit 255 analyzes at least one of the signaling information, trigger information, and metadata, and supplies the analysis result to the metadata acquisition unit 253 or the application control unit 257.

  The media time timer 256 sets the media time information supplied from the trigger information acquisition unit 252 and measures the time based on the media time information.

  The application control unit 257 controls the operation of the application by controlling the application engine 222 (FIG. 26) according to the analysis result from the analysis unit 255.

(Configuration example of each server)
FIG. 28 is a diagram illustrating a configuration example of each server in FIG. FIG. 28 shows a configuration example of the application server 30, the metadata server 40, and the ACR server 50.

  In FIG. 28, the application server 30 includes a control unit 311, an application generation unit 312, an application holding unit 313, and a communication unit 314. The control unit 311 controls the operation of each unit of the application server 30. The application generation unit 312 generates an application (for example, composed of an HTML file or a JPEG file) that is executed in conjunction with the AV content in accordance with control from the control unit 311, and causes the application storage unit 313 to store the application.

  The communication unit 314 communicates with the receiving device 20 via the Internet 90 according to control from the control unit 311. The control unit 311 constantly monitors the communication status of the communication unit 314. When an application is requested from the reception device 20, the control unit 311 acquires the application from the application holding unit 313 and supplies the application to the communication unit 314. The communication unit 314 transmits the application to the requesting receiving device 20 via the Internet 90 in accordance with the control from the control unit 311.

  The application server 30 is configured as described above.

  28, the metadata server 40 includes a control unit 411, a metadata generation unit 412, a metadata holding unit 413, and a communication unit 414. The control unit 411 controls the operation of each unit of the metadata server 40. The metadata generation unit 412 generates metadata including at least one piece of information among AIT, EMT, and CCT in accordance with control from the control unit 411 and holds the metadata in the metadata holding unit 413.

  The communication unit 414 communicates with the receiving device 20 via the Internet 90 according to control from the control unit 411. The control unit 411 constantly monitors the communication status of the communication unit 414, and when metadata is requested from the receiving device 20, acquires the metadata from the metadata holding unit 413 and supplies it to the communication unit 414. The communication unit 414 transmits metadata to the requesting receiving apparatus 20 via the Internet 90 in accordance with control from the control unit 411.

  The metadata server 40 is configured as described above.

  In FIG. 28, the ACR server 50 includes a communication unit 511, an ACR identification processing unit 512, an FP database 513, a trigger information generation unit 514, and a trigger information database. The communication unit 511 communicates with the receiving device 20 via the Internet 90. When receiving the trigger information inquiry from the receiving device 20, the communication unit 511 receives the fingerprint information and supplies the fingerprint information to the ACR identification processing unit 512.

  The ACR identification processing unit 512 compares the fingerprint information supplied from the communication unit 511 with the FP database 513 prepared in advance, and performs ACR identification processing for identifying the AV content being played back by the receiving device 20 as the inquiry source. Do. The ACR identification processing unit 512 supplies the result of the ACR identification processing to the trigger information generation unit 514.

  The fingerprint information (feature amount) is, for example, specific information of all or part of AV content, and a large number of AV content specific information is registered in the FP database 513 in advance. In the ACR identification process, for example, the degree of similarity or coincidence of the unique information is determined. In addition, as a method for determining the degree of similarity or the degree of coincidence, a known technique disclosed by various documents or the like can be used.

  The trigger information generation unit 514 generates trigger information based on the result of the ACR identification process supplied from the ACR identification processing unit 512 and various types of information registered in the trigger information database 515, and supplies the trigger information to the communication unit 511. To do. The communication unit 511 transmits the trigger information supplied from the trigger information generation unit 514 to the receiving device 20 that is the inquiry source via the Internet 90.

  The ACR server 50 is configured as described above.

<5. Flow of processing executed by each device>

  Next, with reference to the flowcharts of FIGS. 29 to 36, the flow of processing executed by each device constituting the broadcast communication system 1 of FIG. 24 will be described.

(Digital broadcast signal transmission processing)
First, the flow of digital broadcast signal transmission processing executed by the transmission device 10 of FIG. 24 will be described with reference to the flowchart of FIG.

  In step S111, the signaling information generation unit 111 generates signaling information. In step S112, the signaling information processing unit 112 processes the signaling information generated in step S111.

  In step S113, the metadata generation unit 113 generates metadata. In step S114, the metadata processing unit 114 processes the metadata generated in the process of step S113.

  In step S115, the audio data acquisition unit 115 acquires audio data of AV content from an external server or the like. In step S116, the audio encoder 116 encodes the audio data obtained in step S115 in accordance with an encoding method such as MPEG.

  In step S117, the video data acquisition unit 117 acquires video data of AV content from an external server or the like. In step S118, the trigger information generation unit 119 generates trigger information in accordance with the progress of the AV content corresponding to the video data acquired in the process of step S117.

  In step S119, the video encoder 118 encodes the video data acquired in the process of step S117 in accordance with an encoding method such as MPEG. However, when encoding the video data, the video encoder 118 embeds the trigger information supplied from the trigger information generation unit 119 in the video data and performs the encoding.

  In step S120, the multiplexing unit 120 encodes the signaling information processed in step S112, the metadata processed in step S114, the audio data encoded in step S116, and the processing in step S119. The video data is multiplexed and the resulting BBP stream is supplied to the transmitter 121.

  In step S <b> 121, the transmission unit 121 transmits the BBP stream generated in the process of step S <b> 120 as a digital broadcast signal using the IP transmission scheme via the antenna 122. When the process of step S121 ends, the digital broadcast signal transmission process of FIG. 29 ends.

  The flow of the digital broadcast signal transmission process has been described above. In the digital broadcast signal transmission process of FIG. 29, the case where the trigger information is embedded in the video data has been described as an example in order to simplify the description.

(Digital broadcast signal reception processing)
Next, the flow of digital broadcast signal reception processing executed by the reception device 20 of FIG. 24 will be described with reference to the flowchart of FIG.

  In step S <b> 211, the tuner 212 performs channel selection / demodulation of the digital broadcast signal received through the antenna 211 using the IP transmission method. In step S212, the demultiplexing unit 213 separates audio data and video data from the BBP stream demodulated in step S211.

  In step S213, the audio decoder 214 decodes the audio data separated in the process of step S212 by a decoding method corresponding to the encoding method by the audio encoder 116 (FIG. 25). In step S214, the video decoder 216 decodes the video data separated in the process of step S212 by a decoding method corresponding to the encoding method by the video encoder 118 (FIG. 25).

  In step S215, the audio output unit 215 outputs the audio data decoded in the process of step S213 to a speaker (not shown). In step S216, the video output unit 217 outputs the video data decoded in step S214 to a display (not shown). As a result, the video of the AV content is displayed on the display, and audio synchronized with the video is output from the speaker.

  When the process of step S216 ends, the digital broadcast signal reception process of FIG. 30 ends.

  The flow of digital broadcast signal reception processing has been described above.

(Application control processing linked to recorded programs)
Next, the flow of application control processing linked to a recorded program executed by the receiving device 20 of FIG. 24 will be described with reference to the flowchart of FIG. Prior to the application control process linked to the recorded program, the receiving device 20 receives a digital broadcast signal from the transmitting device 10 and plays a recorded program such as a drama as AV content. And

  In step S231, the signaling information acquisition unit 251 connects to the SCS stream according to the SCS Bootstrap information and acquires the SCS signaling information. The SCS signaling information is analyzed by the analysis unit 255.

  In step S232, the trigger information acquisition unit 252 constantly monitors the video data supplied from the video decoder 216, and acquires trigger information embedded in the video data. This trigger information is analyzed by the analysis unit 255.

  In step S233, the media time timing unit 256 sets the media time information according to the analysis result of the trigger information acquired in the process of step S232, and starts measuring the time based on the media time information.

  In step S234, the metadata acquisition unit 253 acquires metadata (AIT, EMT, CCT) distributed by broadcasting or communication according to the analysis result by the analysis unit 255. Specifically, based on the USD included in the SCS signaling information acquired in the process of step S231 and the location information included in the trigger information acquired in the process of step S232, the distribution route of the metadata is broadcast or communicated. Is determined.

  When the metadata is distributed by broadcasting, the metadata acquisition unit 253 connects to the SCS stream according to SDP or FDD included in the SCS signaling information, and transmits the metadata file transmitted in the FLUTE session. To get. On the other hand, when the metadata is distributed by communication, the metadata acquisition unit 253 controls the communication unit 221 to connect to the metadata server 40 via the Internet 90 according to the location information included in the trigger information, Get metadata file. This metadata is analyzed by the analysis unit 255.

  In step S235, it is determined whether or not the time measured by the media time timer 256 is the start time of the event defined in the EMT list. If it is determined in step S235 that the time measured is not the start time of the event specified in the EMT list, the process returns to step S235, and the determination process in step S235 is repeated. That is, in step S235, the process proceeds to step S236 after waiting for the measured time to be the start time of the event specified in the EMT list.

  In step S236, the application control unit 257 controls the application engine 222 to execute the action of the application corresponding to the event for which it is determined in the determination process in step S235 that the time measurement has reached the start time.

  In step S237, it is determined whether an event to be executed remains in the EMT list. If it is determined in step S237 that there are still events to be executed, the process returns to step S235, and the subsequent processes are repeated.

  That is, in the process of step S234, for example, when the EMT of FIG. 11 described above is acquired, the EMT includes prefetch (Pref) at time T0 as action information for application 1 (App1), and at time T1. Execution (Exec), injection event (Inj_A_E) at time T2, suspend (Susp) at time T4, execute (Exec) at time T5, and kill (Kill) at time T6 are defined. In the EMT of FIG. 11, prefetch (Pref) at time T3, execute (Exec) at time T4, and kill (Kill) at time T5 are defined as action information for application 2 (App2). Yes.

  In this case, the processes of steps S235 to S237 are repeated, and the time measured by the media time timer 256 matches the corresponding event, that is, the prefetch action or execute for the application 1 at the timing when the time T0 to T6 coincides. An action, a prefetch action for the application 2, and the like are sequentially executed.

  If it is determined in step S237 that there are no events to be executed, the application control process linked to the recorded program in FIG. 31 ends.

  The flow of the application control process linked to the recorded program has been described above. The application control process linked to the recorded program corresponds to the use cases 1 and 4 described above.

(Application control processing linked to live programs)
Next, the flow of application control processing linked to a live program executed by the receiving device 20 of FIG. 24 will be described with reference to the flowchart of FIG. Prior to the application control process linked to this live program, the receiving device 20 receives a digital broadcast signal from the transmitting device 10 and plays a live program such as a sports broadcast as AV content. To do.

  In step S251, the signaling information acquisition unit 251 acquires SCS signaling information by connecting to the SCS stream in accordance with the SCS Bootstrap information. The SCS signaling information is analyzed by the analysis unit 255.

  In step S252, the trigger information acquisition unit 252 constantly monitors the video data supplied from the video decoder 216, and acquires trigger information embedded in the video data. This trigger information is analyzed by the analysis unit 255.

  In step S253, the metadata acquisition unit 253 acquires metadata (AIT, CCT) distributed by broadcasting or communication according to the analysis result by the analysis unit 255. Specifically, based on the USD included in the SCS signaling information acquired in the process of step S251 and the location information included in the trigger information acquired in the process of step S252, the metadata distribution route is broadcast or communicated. Is determined.

  When the metadata is distributed by broadcasting, the metadata acquisition unit 253 connects to the SCS stream according to SDP or FDD included in the SCS signaling information, and transmits the metadata file transmitted in the FLUTE session. To get. On the other hand, when the metadata is distributed by communication, the metadata acquisition unit 253 controls the communication unit 221 to connect to the metadata server 40 via the Internet 90 according to the location information included in the trigger information, Get metadata file. This metadata is analyzed by the analysis unit 255.

  In step S <b> 254, the application control unit 257 causes an application distributed by broadcast or communication to be supplied to the application engine 222 according to the analysis result by the analysis unit 255. Specifically, the USD included in the SCS signaling information acquired in the process of step S251, the application URL acquired in the process of step S253, and the application item URL (URL indicating the acquisition destination of the file held in the cache memory) ) To determine whether the application distribution route is broadcast or communication.

  When the application is distributed by broadcasting, the application control unit 257 connects to the NRT stream according to SDP or FDD included in the SCS signaling information, and acquires the application file transmitted in the FLUTE session. . On the other hand, when the application is distributed by communication, the application control unit 257 controls the communication unit 221 to connect to the application server 30 via the Internet 90 according to the application URL or the like and acquire the application file. The application acquired in this way is held in the cache memory 223. The application file held in the cache memory 223 is based on the capacity of the cache memory 223 and the CCT as cache control information.

  In step S255, the trigger information acquisition unit 252 constantly monitors the video data supplied from the video decoder 216 to determine whether the trigger information embedded in the video data has been acquired. If it is determined in step S255 that the trigger information has been acquired, the process proceeds to step S256.

  In step S256, the application control unit 257 controls the application engine 222 to execute the action of the application included in the trigger information acquired in the process of step S255. Note that when the process of step S256 ends, the process proceeds to step S257. If it is determined in step S255 that the trigger information has not been acquired, the process in step S256 is skipped, and the process proceeds to step S257.

  In step S257, it is determined whether the live program being played has ended. If it is determined in step S257 that the live program being reproduced has not ended, the process returns to step S255, and the subsequent processes are repeated.

  Then, at the timing when the trigger information is acquired by repeating the processing of steps S255 to S257, for example, according to the action information included in the trigger information, for example, a prefetch action or execute action for the application 1, or a prefetch for the application 2 Actions will be executed.

  If it is determined in step S257 that the live program has ended, the application control process linked to the live program in FIG. 32 ends.

  The flow of application control processing linked to a live program has been described above. The application control process linked to this live program corresponds to the use cases 2 and 5 described above.

(Hybrid application control processing)
Next, the flow of the hybrid type application control process executed by the reception device 20 of FIG. 24 will be described with reference to the flowchart of FIG. Note that it is assumed that AV content such as a program is played on the receiving device 20.

  In step S271, the signaling information acquisition unit 251 acquires SCS signaling information by connecting to the SCS stream in accordance with the SCS Bootstrap information. The SCS signaling information is analyzed by the analysis unit 255.

  In step S272, the trigger information acquisition unit 252 constantly monitors the video data supplied from the video decoder 216, and acquires trigger information embedded in the video data. This trigger information is analyzed by the analysis unit 255.

  In step S273, the media time timing unit 256 sets the media time information in accordance with the analysis result of the trigger information acquired in the process of step S272, and starts measuring the time based on the media time information.

  In step S274, the metadata acquisition unit 253 acquires metadata (AIT, EMT, CCT) distributed by broadcasting or communication according to the analysis result by the analysis unit 255. Specifically, based on the USD included in the SCS signaling information acquired in the process of step S271 and the location information included in the trigger information acquired in the process of step S272, the metadata distribution route is broadcast or communicated. Is determined.

  When the metadata is distributed by broadcasting, the metadata acquisition unit 253 connects to the SCS stream according to SDP or FDD included in the SCS signaling information, and transmits the metadata file transmitted in the FLUTE session. To get. On the other hand, when the metadata is distributed by communication, the metadata acquisition unit 253 controls the communication unit 221 to connect to the metadata server 40 via the Internet 90 according to the location information included in the trigger information, Get metadata file. This metadata is analyzed by the analysis unit 255.

  In step S275, it is determined whether or not the time measured by the media time timer 256 is the start time of the event defined in the EMT list. If it is determined in step S275 that the time measured has reached the start time of the event specified in the EMT list, the process proceeds to step S276.

  In step S276, the application control unit 257 controls the application engine 222 to execute the action of the application corresponding to the event for which it is determined in the determination process in step S275 that the time measurement time has reached the start time. Note that when the process of step S276 ends, the process proceeds to step S277. If it is determined in step S275 that the time measured is not the start time of the event specified in the EMT list, the process in step S276 is skipped, and the process proceeds to step S277.

  In step S277, the video data supplied from the video decoder 216 is constantly monitored to determine whether trigger information embedded in the video data has been acquired. If it is determined in step S277 that trigger information has been acquired, the process proceeds to step S278.

  In step S278, it is determined whether or not event information is specified in the trigger information acquired in step S277. If it is determined in step S278 that event information is specified in the trigger information, the process proceeds to step S279.

  In step S279, the analysis unit 255 edits the EMT according to the editing content of the event information included in the trigger information. Here, for example, the execution time of the execute action for the application 1 defined in the EMT is updated from the time T1 to the time T1A, or the injection event action for the application 1 at the time T2 is deleted. Is edited.

  On the other hand, if it is determined in step S278 that event information is not specified in the trigger information, the process proceeds to step S280. In step S280, the application control unit 257 controls the application engine 222 to execute an application action included in the trigger information.

  If it is determined in step S277 that trigger information has not been acquired, steps S278 to S280 are skipped, and the process proceeds to step S281. When the process of step S279 or S280 is completed, the process proceeds to step S281.

  In step S281, it is determined whether the program being reproduced has ended. If it is determined in step S281 that the program being reproduced has not ended, the process returns to step S275, and the subsequent processing is repeated. If it is determined in step S281 that the program being played has ended, the hybrid type application control process in FIG. 33 ends.

  The flow of hybrid application control processing has been described above. This hybrid application control process corresponds to the use case 3 described above.

(Application delivery process)
Next, the flow of application distribution processing executed by the application server 30 of FIG. 24 will be described with reference to the flowchart of FIG.

  In step S <b> 311, the control unit 311 constantly monitors the communication status of the communication unit 314 and determines whether an application is requested from the reception device 20. If it is determined in step S311 that an application is not requested, the determination process in step S311 is repeated. That is, in step S311, the process is advanced to step S312 after waiting for an application request from the receiving device 20.

  In step S <b> 312, the communication unit 314 acquires the application held in the application holding unit 313 according to the control from the control unit 311. In step S 313, the communication unit 314 transmits the application acquired in the process of step S 312 to the request receiving device 20 via the Internet 90 in accordance with the control from the control unit 311. When the process of step S313 ends, the application distribution process of FIG. 34 ends.

  The flow of application distribution processing has been described above.

(Metadata distribution process)
Next, the flow of metadata distribution processing executed by the metadata server 40 of FIG. 24 will be described with reference to the flowchart of FIG.

  In step S411, the control unit 411 constantly monitors the communication status of the communication unit 414 and determines whether metadata is requested from the reception device 20. If it is determined in step S411 that metadata is not requested, the determination process in step S411 is repeated. That is, in step S411, the process proceeds to step S412 after waiting for metadata to be requested from the receiving device 20.

  In step S <b> 412, the communication unit 414 acquires metadata held in the metadata holding unit 413 in accordance with control from the control unit 411. In step S 413, the communication unit 414 transmits the metadata acquired in the processing in step S 412 to the request receiving device 20 via the Internet 90 in accordance with the control from the control unit 411. When the process of step S413 ends, the metadata distribution process of FIG. 35 ends.

  The flow of the metadata distribution process has been described above.

(Trigger information distribution process)
Next, the flow of trigger information distribution processing executed by the ACR server 50 of FIG. 24 will be described with reference to the flowchart of FIG.

  In step S511, an inquiry about trigger information is received from the receiving device 20, and it is determined whether or not the fingerprint information is received. If it is determined in step S511 that the fingerprint information has not been received, the determination process in step S511 is repeated. In other words, in step S511, after the fingerprint information is received by the communication unit 511, the process proceeds to step S512.

  In step S512, the ACR identification processing unit 512 collates the fingerprint information received in the process of step S511 with the FP database 513 prepared in advance, and identifies the AV content being played back by the receiving device 20 as the inquiry source. ACR identification processing is performed.

  In step S513, the trigger information generation unit 514 generates trigger information based on the result of the ACR identification process obtained in the process of step S512 and various information registered in the trigger information database 515.

  In step S <b> 514, the communication unit 511 transmits the trigger information generated in the process of step S <b> 513 to the inquiry source receiving device 20 via the Internet 90. When the process of step S514 ends, the trigger information distribution process of FIG. 36 ends.

  The trigger information distribution process flow has been described above.

  In the above description, broadcast contents such as recorded programs and live programs have been described as AV contents. However, instead of broadcast contents, communication contents are streamed from a streaming server (not shown) via the Internet 90. You may be made to do.

<6. Computer configuration>

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software is installed in the computer. FIG. 37 is a diagram illustrating a hardware configuration example of a computer that executes the above-described series of processing by a program.

  In the computer 900, a CPU (Central Processing Unit) 901, a ROM (Read Only Memory) 902, and a RAM (Random Access Memory) 903 are connected to each other by a bus 904. An input / output interface 905 is further connected to the bus 904. An input unit 906, an output unit 907, a recording unit 908, a communication unit 909, and a drive 910 are connected to the input / output interface 905.

  The input unit 906 includes a keyboard, a mouse, a microphone, and the like. The output unit 907 includes a display, a speaker, and the like. The recording unit 908 includes a hard disk, a nonvolatile memory, and the like. The communication unit 909 includes a network interface or the like. The drive 910 drives a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

  In the computer 900 configured as described above, the CPU 901 loads the program stored in the ROM 902 or the recording unit 908 to the RAM 903 via the input / output interface 905 and the bus 904 and executes the program. A series of processing is performed.

  The program executed by the computer 900 (CPU 901) can be provided by being recorded on a removable medium 911 as a package medium, for example. The program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

  In the computer 900, the program can be installed in the recording unit 908 via the input / output interface 905 by attaching the removable medium 911 to the drive 910. Further, the program can be received by the communication unit 909 via a wired or wireless transmission medium and installed in the recording unit 908. In addition, the program can be installed in the ROM 902 or the recording unit 908 in advance.

  Here, in the present specification, the processing performed by the computer according to the program does not necessarily have to be performed in time series in the order described as the flowchart. That is, the processing performed by the computer according to the program includes processing executed in parallel or individually (for example, parallel processing or object processing). The program may be processed by a single computer (processor) or may be distributedly processed by a plurality of computers.

  The embodiments of the present technology are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.

  Moreover, this technique can take the following structures.

(1)
A first acquisition unit that acquires trigger information including at least location information as information for controlling the operation of an application executed in conjunction with AV (Audio Video) content;
A second acquisition unit that acquires application control information for controlling the operation of the application;
And a control unit that controls the operation of the application based on the trigger information and the application control information.
(2)
The trigger information includes time information serving as a reference of time for controlling the operation of the application,
The second acquisition unit acquires schedule control information that defines the operation of the application in time series,
When the time measured based on the time information has passed the time specified in the schedule control information, the control unit performs the operation of the application according to action information for the application corresponding to the time. The receiving device according to (1).
(3)
The application is composed of a plurality of files,
The second acquisition unit acquires cache control information for controlling a cache of a file group constituting the application,
The receiving device according to (2), wherein the control unit causes a cache memory to hold a file group constituting the application based on the cache control information.
(4)
The trigger information includes editing information for editing the contents defined in the schedule control information,
The receiving device according to (2) or (3), wherein the control unit edits the schedule control information based on the editing information.
(5)
The location information is information for acquiring the application control information, the schedule control information, and the cache control information,
The receiving device according to (3) or (4), wherein the application control information, the schedule control information, and the cache control information are associated by identification information of the application.
(6)
The trigger information includes action information for the application,
The receiving device according to (1), wherein when the trigger information is acquired, the control unit controls the operation of the application according to the action information included in the trigger information.
(7)
The application is composed of a plurality of files,
The second acquisition unit acquires cache control information for controlling a cache of a file group constituting the application,
The receiving device according to (6), wherein the control unit causes a cache memory to hold a file group configuring the application based on the cache control information.
(8)
The location information is information for acquiring the application control information and the cache control information,
The receiving device according to (7), wherein the trigger information, the application control information, and the cache control information are associated by identification information of the application.
(9)
The AV content is broadcast content transmitted by a digital broadcast signal,
The trigger information is distributed in a digital broadcast signal or distributed from a server on the Internet,
The receiving device according to any one of (1) to (8), wherein the first acquisition unit acquires the trigger information distributed by broadcast or communication.
(10)
In the receiving method of the receiving device,
The receiving device is
Trigger information including at least location information is acquired as information for controlling the operation of an application executed in conjunction with AV content,
Obtaining application control information for controlling the operation of the application;
A receiving method including a step of controlling an operation of the application based on the trigger information and the application control information.
(11)
An acquisition unit for acquiring AV content;
A first generator that generates trigger information including at least location information as information for controlling the operation of an application executed in conjunction with the AV content;
A second second generating unit for generating application control information for controlling the operation of the application;
A transmission apparatus comprising: a transmission unit that transmits the trigger information and application control information together with the AV content.
(12)
The first generation unit generates the trigger information including time information serving as a reference of time for controlling the operation of the application,
The second generation unit generates schedule control information that defines the operation of the application in time series,
The transmission device according to (11), wherein the transmission unit transmits the trigger information including the time information and the schedule control information.
(13)
The application is composed of a plurality of files,
The second generation unit generates cache control information for controlling a cache of a file group constituting the application,
The transmission device according to (12), wherein the transmission unit further transmits the cache control information.
(14)
The first generation unit generates the trigger information including editing information for editing the contents defined in the schedule control information,
The transmission device according to (12) or (13), wherein the transmission unit transmits the trigger information including the editing information.
(15)
The location information is information for acquiring the application control information, the schedule control information, and the cache control information,
The transmission device according to (13) or (14), wherein the application control information, the schedule control information, and the cache control information are associated by identification information of the application.
(16)
The first generation unit generates the trigger information including action information for the application,
The transmission device according to (11), wherein the transmission unit transmits the trigger information including the action information.
(17)
The application is composed of a plurality of files,
The second generation unit generates cache control information for controlling a cache of a file group constituting the application,
The transmission device according to (16), wherein the transmission unit further transmits the cache control information.
(18)
The location information is information for acquiring the application control information and the cache control information,
The transmission device according to (17), wherein the trigger information, the application control information, and the cache control information are associated by identification information of the application.
(19)
The AV content is broadcast content,
The transmission device according to any one of (11) to (18), wherein the transmission unit transmits the trigger information and application control information together with the AV content by a digital broadcast signal.
(20)
In the transmission method of the transmission device,
The transmitting device is
Get AV content,
As information for controlling the operation of the application executed in conjunction with the AV content, generating trigger information including at least location information,
Obtaining and generating application control information for controlling the operation of the application;
A transmission method including a step of transmitting the trigger information and application control information together with the AV content.

  DESCRIPTION OF SYMBOLS 1 Broadcast communication system, 10 Transmitter, 20 Receiver, 30 Application server, 40 Metadata server, 50 ACR server, 90 Internet, 111 Signaling information production | generation part, 113 Metadata production | generation part, 115 Audio data acquisition part, 117 Video data Acquisition unit, 119 trigger information generation unit, 121 transmission unit, 212 tuner, 218 control unit, 221 communication unit, 222 application engine, 223 cache memory, 251 signaling information acquisition unit, 252 trigger information acquisition unit, 253 metadata acquisition unit, 254 Fingerprint information acquisition unit, 255 analysis unit, 256 media time timing unit, 257 application control unit, 311 control unit, 313 application , Storage unit, 314 communication unit, 411 control unit, 413 metadata storage unit, 414 communication unit, 511 communication unit, 512 ACR identification processing unit, 514 trigger information generation unit, 900 computer, 901 CPU

Claims (20)

A first acquisition unit that acquires trigger information including at least location information as information for controlling the operation of an application executed in conjunction with AV (Audio Video) content;
A second acquisition unit that acquires application control information for controlling the operation of the application;
And a control unit that controls the operation of the application based on the trigger information and the application control information. The trigger information includes time information serving as a reference of time for controlling the operation of the application,
The second acquisition unit acquires schedule control information that defines the operation of the application in time series,
When the time measured based on the time information has passed the time specified in the schedule control information, the control unit performs the operation of the application according to action information for the application corresponding to the time. The receiving device according to claim 1. The application is composed of a plurality of files,
The second acquisition unit acquires cache control information for controlling a cache of a file group constituting the application,
The receiving device according to claim 2, wherein the control unit causes a cache memory to hold a file group constituting the application based on the cache control information. The trigger information includes editing information for editing the contents defined in the schedule control information,
The receiving device according to claim 3, wherein the control unit edits the schedule control information based on the editing information. The location information is information for acquiring the application control information, the schedule control information, and the cache control information,
The receiving device according to claim 4, wherein the application control information, the schedule control information, and the cache control information are associated by identification information of the application. The trigger information includes action information for the application,
The receiving device according to claim 1, wherein when the trigger information is acquired, the control unit controls the operation of the application according to the action information included in the trigger information. The application is composed of a plurality of files,
The second acquisition unit acquires cache control information for controlling a cache of a file group constituting the application,
The receiving device according to claim 6, wherein the control unit causes a cache memory to hold a file group constituting the application based on the cache control information. The location information is information for acquiring the application control information and the cache control information,
The receiving device according to claim 7, wherein the trigger information, the application control information, and the cache control information are associated by identification information of the application. The AV content is broadcast content transmitted by a digital broadcast signal,
The trigger information is distributed in a digital broadcast signal or distributed from a server on the Internet,
The receiving device according to claim 1, wherein the first acquisition unit acquires the trigger information distributed by broadcasting or communication. In the receiving method of the receiving device,
The receiving device is
Trigger information including at least location information is acquired as information for controlling the operation of an application executed in conjunction with AV content,
Obtaining application control information for controlling the operation of the application;
A receiving method including a step of controlling an operation of the application based on the trigger information and the application control information. An acquisition unit for acquiring AV content;
A first generator that generates trigger information including at least location information as information for controlling the operation of an application executed in conjunction with the AV content;
A second second generating unit for generating application control information for controlling the operation of the application;
A transmission apparatus comprising: a transmission unit that transmits the trigger information and application control information together with the AV content. The first generation unit generates the trigger information including time information serving as a reference of time for controlling the operation of the application,
The second generation unit generates schedule control information that defines the operation of the application in time series,
The transmission device according to claim 11, wherein the transmission unit transmits the trigger information including the time information and the schedule control information. The application is composed of a plurality of files,
The second generation unit generates cache control information for controlling a cache of a file group constituting the application,
The transmission device according to claim 12, wherein the transmission unit further transmits the cache control information. The first generation unit generates the trigger information including editing information for editing the contents defined in the schedule control information,
The transmission device according to claim 13, wherein the transmission unit transmits the trigger information including the editing information. The location information is information for acquiring the application control information, the schedule control information, and the cache control information,
The transmission device according to claim 14, wherein the application control information, the schedule control information, and the cache control information are associated by identification information of the application. The first generation unit generates the trigger information including action information for the application,
The transmission device according to claim 11, wherein the transmission unit transmits the trigger information including the action information. The application is composed of a plurality of files,
The second generation unit generates cache control information for controlling a cache of a file group constituting the application,
The transmission device according to claim 16, wherein the transmission unit further transmits the cache control information. The location information is information for acquiring the application control information and the cache control information,
The transmission device according to claim 17, wherein the trigger information, the application control information, and the cache control information are associated with each other by identification information of the application. The AV content is broadcast content,
The transmission device according to claim 11, wherein the transmission unit transmits the trigger information and application control information together with the AV content using a digital broadcast signal. In the transmission method of the transmission device,
The transmitting device is
Get AV content,
As information for controlling the operation of the application executed in conjunction with the AV content, generating trigger information including at least location information,
Obtaining and generating application control information for controlling the operation of the application;
A transmission method including a step of transmitting the trigger information and application control information together with the AV content.

Images